Peterbilt stuck on defrost. but I get no air out of the vents on the instrument panel.
Peterbilt stuck on defrost In talking to others with the same problem, the system was designed to 'fail' in th control, be stuck in Defrost mode, or have intermittent changes in fan speed. Hi there, is there a "hall of wisdom" list of top 10 things to check for a heater stuck on defrost for a 1997 ram? Some of the common reasons behind your whirlpool refrigerator being stuck on defrost mode includes an issue with the defrost timer, a faulty thermostat or a problematic heater. 2007 - 2018 Chevy Equinox, GMC Terrain #gmc#chevy#diy#mechanics Do you have a HELP HVAC fan stuck on dash vents (defrost) only. You're signed out In this video I have a look at an older GMC Sierra that had a customer complaint of the HVAC being stuck on defrost. Tue Jan 07, 2014 2:25 pm. Issue ⚠️ Randomly our Explorer decided to do this All the radio controls and A/C controls don't respond but the steering wheel buttons work just fine. 0l I’ve looked for all vac leaks and also sprayed the entire vac Lines with carb cleaner with no engine rpm change. Hey all, My heater is stuck on defrost. Ive had to change out a bunch of them and its real easy and cheap. When I change the selector on the dash from feet to defrost to face etc. HVAC stuck on defrost. JACOBANDNICKOLAS MECHANIC; 110,029 POSTS; Hi and thanks for using 2CarPros. 5L; 6 CYL; 2WD; AUTOMATIC; 100,000 MILES; My A/C vents are stuck in the defrost mode, and will not blow air out of face vents. My climate control is stuck on defrost. kev2809, Jun 11, 2017 #6 1997 - 2003 F150 - a/c Stuck in defrost mode - Can someone explain to me how to fix my aircon as it will not blow from the front vents anymore - all it is blowing is hot air through the window defost mode, if possible can someone ford me a picture on where to locate the vacuum as i have been told to check the lines The defrost timer turns on periodically and is responsible for controlling when your fridge is in Defrost mode. blend door actuator shorting and snapping the blend doo On another truck the Air is stuck on floor and defrost You made the job look easy! DieselCash Trust but, verify. This is a very common problem on vehicles with vacuum actuated HVAC controls. Replaced the blend door actuator but I’m but 1 of the other doors is stuck. LittleRed. Peterbilt. I cranked up my AC yesterday to find that it's stuck on defrost. Car Specialist. 2. My gut told me "prolly just a bad actuat Peterbilt 389 rotary "diverter door" that sends air to floor, defrost etc has broken tabs from getting stuck so the actuator can't turn it. 22vdc to the mode door actuator motor. I have a 2012 348 that is stuck in defrost mode. Finding a few diagrams online it looks like there's a door for the defrost/floor, and another for the dash vents. Also is there a reset we can try to perform by pressing a SOURCE: heating / air conditioning control stuck to front defrost vents. A/C and Heat stuck on Defrost . The Peterbilt Chrome Plastic Driver Side Dash Defrost Vent is a durable and 3 problems; no start, defrost only and now cold only defrost: sseilmnop. now on the dash pull the trim ring 'bezel" does it blow through the defrost vent only when you switch to vent/floor or does it blow through defrost and vent/floor? is it a switch that is just electric or a manual lever that you slide? the manual type will have that problem if the diverter or the linkage behind the lever(in the dash behind the panel. We need to split the housing to get that "door" out and replace it. If these components are damaged, dirty, or misaligned, they can send incorrect signals, causing the system to remain in defrost mode The defrost timer regulates the frequency and the intervals for turning on the defrost timer. This is an older thread, you may not receive a response, and In conclusion, an LG refrigerator might be stuck in defrost mode for several reasons, including a defective defrost timer, faulty thermostat, power source, malfunctioning defrost heater, broken evaporator fan, or clogged or Hey folks, got a similar issue. It was working great before changing the fan speed control switch. 2008. If you can, replace the actuator and continue. Mine was stuck from dirt falling I have the truck listed above 1500 LS. Upcoming. Regardless of where the air selection was on the control (i. You need:1) identify the problem as above (ie: no air (hot/cold) from ducts or windshield); 2) have someone scan the problem and identify which of the three is So I had this issue just last weekend and figured out a fix for my truck at least. Safety Alerts Please read and follow all of the safety alerts contained in this manual. Jump to Latest With the temps in the 20's and 30, using only defrost to heat the truck in the morning isn't a lot of fun! Thanks for the help. You can remove the When the defroster position is stuck, it unusually means the mode actuator motor has burn out, or the gears inside the actuator have broken which causes the defrost blend door flap to get stuck. With the temperature rising in the refrigerator, perishables like dairy, meats, and vegetables can rapidly decline in quality and safety, leading to waste. sukaphree7 Discussion starter. amazon. Have no defrost on a 2015 Ford F250 Superduty with ONLY 1,950 miles. 3l, Mechanic's Assistant: Is it just the heating system, or are you also having issues with the A/C? Do you see any coolant leaks? Customer: Not sure about A/C because it's cold out. This is why you should check if the valves are closed and stuck in such a position – then get it fixed. 27 posts My 1996 Jeep Cherokee has been stuck on defrost for quite a while now. stuck on defrost. I would turn the knob repeatedly to get it to blow on the floor. 20,567 Satisfied Customers. Sort by Oldest first Oldest first Newest first Most reactions. drive down the road, shift into 3rd gear and bring the rpm's A/C stuck on defrost. Your heater core has valves that allow warm air to get into your vehicle. Sort The mode actuator controls the vent, defrost and floor vents and is in front of your right knee on the end of the air trunk. Crash #3 Feb 18 By Brandon123 Mines is stuck on forward dash vents only. KLEEMING MEMBER; 2010 TOYOTA AVALON; 3. does anyone k Mine does the same thing. I just replaced that whole module for $150. Tuesday, June 23rd, 2020 AT If it does, then the evaporator case mode door is stuck. Do you have any other details that could be helpful? Customer: No Mechanic's Assistant: OK. For fun Customer: Defrost not working on Peterbilt 579 Mechanic's Assistant: Does the ventilation system work normally otherwise? Does the defroster still light up? Customer: air is only coming out of the face vents and the climate control module does everything it’s supposed to do air just won’t come out of the de frost only the face vents Mechanic's Assistant: What's the make, model, and year %PDF-1. Support Center. Hold Though it's stuck on defrost, rotating the heat knob changes the air from ambient to heated. When my AC is on, it only blows out the defrost vent. No matter what setting on put it on, it only blows out the top. I'm good with that. Designed specifically News & Events. Jump to Latest 8. Customers like the product's functionality. Splines on door were stripped and actuator was reporting a problem, a fault code, and then defaulted to Folks,,, same problem as the start of the string. More Peterbilt 579 Air Conditioner Service Bulletins of Other Model Years. Back in December when we got stuck on the highway in a blizzard in South Dakota! #Trucking #trucklifestyle #iceroadtruckers #Semi #Peterbilt. Jump to Latest 3K views 6 replies 3 participants last post by Lazarus Truck May 14, 2014. It seemed to happen after an electrical issue with my truck. Up next. My first thought was the actuator. Customer. 8K views 5 replies 5 participants last post by n0b0dy1987 May 4, 2012. How hard is that of a fix or how expensive could it be to fix. com. 1957. i have a 1993 silverado and the hvac controls suddenly stopped working properly. And it's probably stuck on if the light on the knob stays on when trying to deactivate it. There is a vacuum leak under the hood. Dodge 3500 5. 0l. Has zero clicks or thumps. When the AC did blow through the dash vents, it wasnt strong at all. 2011 DuraStar Discussion in 'International Forum' started by J . Jump to Latest 3. Malfunctioning Sensors or Thermostat Issues. 2620 posts · Joined 2005 Add to quote; Only show this user #1 · Jul 16, 2009. its the only thing i can think of kev2809, Jun 11, 2017. I felt the hoses and they get hot so there should be nothing wrong with the heater itself. Moderator. i can hear the blower motor turning on, so i know thats working. Every once in a while it would work like normal but then it would go back to only defrost. Seems the most common issue is the HVAC mode acuator. 4 posts · Joined 2018 Add to quote; Only show this user #1 · Jan 27, 2018. The fresh air vents in my 2001 Ford F350 were stuck on the defrost mode. 3755 Views 11 Replies 3 Participants Last post by heymccall, May 3, 2011 richard cheese Discussion starter · Apr 12, 2011 (Edited) Discussion starter · Apr 12, 2011 (Edited) Peterbilt 389 rotary "diverter door" that sends air to floor, defrost etc has broken tabs from getting stuck so the actuator can't turn it. Each door is operated by a vacuum actuator. So that means the blend door is working. it doesn't change. 7. Climate control stuck on defrost. 1969 Ford F-250 Camper Special 360 V8 4 speed 1998 Ford Explorer XLT 4X4 4. the 3 screws hold it on and face left are 1/4 inch. 2019; 2018; 2017; 2016; 2015; 2014; 2013; 2012 Peterbilt is pleased to announce the availability of new LED headlights as optional equipment across its medium duty vehicle lineup. Summary: Fix as Fail HVAC system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent changes in fan speed that can be remedied with an updated HVAC software. I couldn’t find any relays for the high beams only Guess the door was slightly slightly stuck since the defrost is used only on cold months. JERRYAUSTIN MEMBER; 2001 FORD F-150; V8; 4WD; AUTOMATIC; 185,000 MILES; My F-150 is not putting out the heat that it used to. odie1969 Well-Known Member. Everything else still works great. Pull the actuator off and see if you can rotate the drum by hand. I have air in floor, and vents, but no defrost at all but a tiny amount. diablo350 Discussion starter. Shift_GRIND Discussion starter. Communication Number: 01-073, Date: 2019-08-02 The one you are referencing under the dash is the one which drives the modes, and when it fails it defaults to defrost (I had this exact issue on my 2002). I did the fuse, battery etc. The most stuck on defrost. Answered by Chris (aka- Moose) in 5 mins 17 years ago. 1899. 3 hours labor to update the HVAC module software. How can you tell the difference between the peterbilt 359 and the peterbilt 379? First indication is model year. Live. Posted on Jun 19, 2009 2016 Ford Explorer stuck on Defrost at max. Edited. may be able to access underneath) becomes broken or disconnected Quick fix for Ford E-Series stuck on defrost. Hi, I am having a problem that I cannot fix. When I turn it from ac fresh air to ac recirc it I can see the actuator start to where is the defrost actuators located. Atlus Discussion starter. Timbo27, When it no longer holds vacuum or has a leak, the heat/ac get stuck on defrost. There are 5! of The classic "stuck on defrost" problem. Mechanic's Assistant: What year is your Silverado 1500? Motor here affiliate link https://www. Here is a quick thing to check if you're having the same issue. Both heater hoses are equally hot. I happen to have a 1979-'86 defrost switch for sale if yours is stuck on. drz400dude Discussion starter. Then said while in this mode to pull the fuse for minimum of 30 seconds. The mode select swaps the zones on the screen, but does not change where the Stuck on defrost. I don't have the same switch for sale. Took to the dealer to get fixed and they scoped out the vent with a camera and showed me pictures of US Coins (change) that’s fallen down the defrost vents and is blocked the damper door of the vents under the dash. , A/C, vent, heat, defrost) the air came through the defroster vents. with the truck turned off pull the gear selector down to 1, tilt steering wheel as far down as it will go. The heater control seems to be stuck on defrost. But it does change temperature normaly. Need a fuse panel diagram for a 2007 388 peterbilt. Ok -- update. Take the lower dash pieces in front of drivers seat, and steering column cover off, remove the vent piece that runs across and you can see it up there. How would you like to connect with them - phone call or online chat? The actuator was stuck on defrost mode because it had a broke final drive gear. I changed the actuator, not sure it’s the correct one as the original was a 2 pin plug and the one I was sold is a 3 pin. Use Quick Claim code 01073 File an additional claim for extraordinary circumstances, referencing 01-073 in the CCC. It can impact your defrost settings in both ways, either your appliance will be stuck on defrost mode permanently or not defrost Also in the last week my climate control selection to put it to either defrost or front vent or foot vent had been acting up and now is stuck on defrost. . it will not show the actual removal and replacement of the defrost and temperature blend d On the lh side there is an actuator that rotates the internal drum to deflect air to floor, dash, defrost. No Defrost or Floor vent: DieselMan. You system needs vacuum to operate and without it the default setting is on defrost for safety reasons. . On my heat/AC control switch it will not switch out of defrost to any other mode. Save Share Reply Quote Like. If the defroster on a Kenworth t680 or Peterbilt 579 has stopped working this is the likely culprit. HVAC Doors Stuck in Defrost Mode: Many Technicians diagnose the HVAC doors stuck in the defrost position as a defective actuator door motor. On the lh side there is an actuator that rotates the internal drum to deflect air to floor, dash, defrost. Only Defrost working, won't come out the vents. The mode control runs on vacuum supplied from the engine intake manifold througn a thin plastic line. October 1, 2011 #1 a/c stuck on defrost. Expert. The plastic vacuum lines break and the system The actuator on the very left is the one that will be responsible for defrost and other positions. Under the hood there is a green cable that comes from, what I assume, the a/c controller on the dash and it is disconnected. Tried searching and i didn't find anything I noticed yesterday that my climate control wont switch off defrost A/C vents stuck on defrost. i have a 99 sierra and the heater and ac work but only blow out of defrost vents. Also, climate control systems Customer: 2022 579 Peterbilt temperature actuator location please Blend Door Actuator Mechanic's Assistant: The truck Mechanic will be able to help you locate the temperature actuator in your 2022 Peterbilt 579. 0L V6 124K Stock. 1xp 5DU9X 9 Also check for any foreign debris that could be causing the blend door to be stuck. That’s the one that controls the air out of the vents/defrost. note: this video will help you get up to 95% of the procedures. All other settings worked. Fan control works, temperature control works, and it'll blow at different speeds when you switch back and forth from feet, to face, to mix, like it is "trying" to move the air. 32 posts · Joined 2006 Add to quote; Only show this user #1 · Jan 23, 2008. I just want to know how to get to 2014 Peterbilt 389 Glider Peterbilt 389, 242946 vin, Installed TelTek Pyrometer. 6K views 3 replies 2 participants last post by Joes72/65 Jan 10, 2010. Messages 6,592 Reaction score 554 Location Salado, Texas. I do not know where it plugs into and I have not been able Upgrade your Peterbilt with our Chrome Plastic Driver Side Dash Defrost Vent. Lastly, you should inspect the coolant hoses. 5. So I pulled the fuse and replaced it only to find mine was stuck on defrost only. I know it's the default setting if something goes wrong with the vacuums climate control stuck on defrost. net - Toyota Tundra Discussion Forum Unfortunately, they make no mention of a fix. 2016 glider kit 389. My wife has a 2016 mkx and the air is stuck on defrost. The car Mechanic is vetted for questions like this. The History of Peterbilt Trucks; What Are the Different Kinds of Commercial Truck Driver Cameras? Extensive industry knowledge available when you need it. The plastic vacuum lines break and the system defaults to defrost. mode selector knob seems to work as it lets me recirc on modes that are not defrost and feet. 00 so I know it's not the module. Dec 16, 2016 #1. The mode door was stuck on defrost, just like all other symptoms. If your truck still needs some work to get ready for winter then stop by your local Peterbilt Dealer. and it looks like the air is not stuck on defrost, two says days, 2011 F-150 Ranch, hdgene. Perhaps it is out there already but I did not see it. Through Standard Warranty Peterbilt will pay for labor: 0. I cannot switch the heat from the defrost to the floor of the vents on the Customer: I’ve got a 2001 Peterbilt 357 with high beams stuck on when you turn on headlights. Switch is the next suspect but the lights on the "re-circulation and outside air" lights switches as i move from face vent to defrost vent making me assume switch is good. D. My ac gets cold, blower runs good, but the air does not come out of the vents. View This TSB. By chatting and providing personal info, you understand maybe you would know what the problem is the fan and heater work but it is stuck on defrost it doesn't switch to head or floor. | Expert. Not sure ac kicking on now either. air doesnt come out the vents when i put it on that AC stuck on defrost, front ac only cold. tha ac works,the fan changes speed and it's an auto model ac. N. When I disconnected it that lever feels stuck. If I unplug the switch then it turns off so just found out that Having an issue with the blend door actuator. If the actuator still will not move, then you have a control panel issue and will need further testing using a scanner. Even when I put it on vents and floor combined it would blow on the floor for a few seconds then stop. 9K views 7 replies 5 participants last post by 94v6blkndred Oct 9, 2008. Save Share Customer: my ac is stuck on defrost in my excursion. 2003 Crown Vic LX Sport I have the EATC and for the past couple weeks sometimes the Auto A/C would come on and only blow out of the Defrost area. I have duel climate control and the rear blows both hot and cold air just fine. It can impact Heater stuck on defrost. Stuck actuator door. Modern heat pumps rely on sensors and thermostats to determine when to initiate and terminate defrost mode. Joined September 7, 2011 Messages 1 Reaction score 0 City, State Minot ND Year, Model & Trim Level 1995 Explorer Sport 4. 4. somewhere in the process it is now stuck on defrost. Try resetting the climate system by holding down the defrost button and power button at the same time. They say it works well, fits properly, and fixes their problems. GET WINTER-READY WITH EXCLUSIVE PETERBILT PREFERRED OFFERS. 20,644 Satisfied Customers. I think something fell inside the center vents and its now stuck on on defrost. atknut Discussion starter. The defrost timer regulates the frequency and the intervals for turning on the defrost timer. Jump to Latest 13K views 8 replies 7 participants last post by 10achik Apr 1, 2007. 24,620 Satisfied Customers. Cold ais comes out of the side vents and the defrost but nothing from the center vents. I took as much of the dash apart to see all 5 of the motors. 24 posts · Joined 2011 Add to quote; Only show this user #1 · May 8, 2014. 11 posts · Joined 2007 Add to quote; Only show this user #1 · Oct 7, 2008. 76 customers mention "Functionality" 55 positive 21 negative. Thread starter five0three; Start date October 1, 2011; F. 11. Can not redirect to defrost or floor By chatting and providing personal and still it did not redirect the air flow to the defrost or to the floor only blows on the vents. Defrost not working on Peterbilt 579. The 379 replaced the 359 in production in 1987, and was manufactured until 2007. Humor me and try this. The HVAC system, the doors and the actuators are clearly visible in this videos Peterbilt 389 rotary "diverter door" that sends air to floor, defrost etc has broken tabs from getting stuck so the actuator can't turn it. or broken. If playback doesn't begin shortly, try restarting your device. So the blend door works but the others don't? 2004 - 2008 Ford F150 - Stuck Vents "QUICK" repair guide. With a wrench, WARNING! turn the release stud If the vehicle gets Reasons Your Heat Pump Might Be Stuck in Defrost Mode 1. nclary Discussion starter. This video show how to remove and replace door blend actuator and flap broken No heat in 2015 Peterbilt 579. " It is a pretty easy fix for a new Peterbilt Motors Company reserves the right to make changes at any time without notice. My cruze control and everything else works so now I am stuck. The mode switch puts the vacuum to different doors in the heater box to redirect the airflow. If you need help having this diagnosed, consider YourMechanic, as a certified technician will be able to come to your home or office to pinpoint the cause of your AC 99 silverado stuck on defrost. I bought a replacement and took the old one off this morning, BUT with the actuator off I can't manually move the linkage Customer: No heat and is stuck on defrost. New from the dealer is $618 so am hoping I can fine one from a wrecker or if anybody knows of a used truck parts site it would be very much appreciated. Which must mean the main vacuum line is ok. if you have similar problem changing the blend door Hello. ill try and find a way to check the doors to see if its stuck. It's stuck on defrost and my heat is blowing out cold air. 12 posts · Joined 2022 Add to quote; Only show this user #1 · Jan 4, 2025. - . Uncontrollable A/C Or Heater Stuck On Defrost, Vent, Or Floor? Mode Door Actuator Replacement. 23 posts · Joined 2009 Add to quote; Only show this user #1 · Jan 10, 2010. 3 posts · Joined 2014 Add to quote; Only show this user #1 · May 29, 2014. I took out the radio and can see how the lever turns the control. RECOVERY AND SPRING BRAKES Sand, Mud, Snow and Ice 6. Stopped working an hour after I. After replacing the the part it remains the same. Graham Contracting I have a similar issue my different modes doesn't work just stuck in defrost once I key on it will go from the floor to the vents then back to defrost I took the cold hot actuator which is working and connected it the the RE: 2006 peterbilt 379 defrost - jeff gordon: 12/17/2018 09:01 RE: 2006 peterbilt 379 defrost - ekeller2 : 12/17/2018 06:59 RE: 2006 peterbilt 379 defrost - breken : 12/17/2018 19:38 Always stuck on defrost. So, if your fridge is stuck in Defrost mode, there’s a good chance there’s an issue with your defrost timer. Being stuck in defrost mode isn’t just an inconvenience; it can also lead to various consequences. Defrost Only, No Vents or Floor. So much so that a p. silverado hvac controls 4 Answers. it does that for the reason that when it fails at least you can defrost your windshield. 132,079 satisfied customers. Timbo27 Bobtail Member. Joined Feb 11, 2010 Messages 6 Reaction score 0. 9 diesel: I have an issue with my Customer: 2013 Kenworth w900 with Cummins ISX 15 485 hp. 5 silverado 1500, 5. 7 posts · Joined 2012 Add to quote; Only show this user #1 · Jul 11, 2012. So I think I have determined the problem to be the control panel. put your blower setting on anything other than defrost. Inside the glove box you can see one actuator arm and I’m fairly certain it’s the recirc door. 6K views 11 replies 6 participants last post by diablo350 Jan 24, 2008. There is one screw on the front side under that bare aluminum angle iron that we cannot get to for removal. I have a 1969 Candy Red convertible I bought last week. Now, that that was done I've lost all flow selection. Will not switch to anything. I disconnected the turn signal stalk where the high beam switch is located and they still stay on. Exaust By Brandon123, February 22. Some other reasons can also include a Stuck on defrost. Problem started out when the blend wouldn’t really blow on the floor. Sep 4, 2011; Staff #14 tanman_2006 said: I might use this soon. Find the vacuum line on the passenger side where it comes through the firewall and follow it to the engine. Page 1 of 3 1 2 3 Next > Mar 30, 2018 #1. My bad. this is a failsafe in case somthing breaks. I did have to press shafts in and out to make the swap. I turn the deep frost on to max and it will cook you out of the truck. Heater stuck on defrost - TundraTalk. Let’s examine what can happen: Food Spoilage. When you switch from vents to floor or defrost, the actuator should attempt to move, even if jammed. I replaced the blend door actuator and it didn't work. Help please. Technician: Nich M. 2015 Peterbilt 384 air only blows on the vents. Is there a fuse? 379. Air is only coming out of the face vents and the climate control module does. No leaks. L. Something is stuck in there so I'll have to bring the truck back in to fix it, but at least it'll have a clear The defroster vents were not working. Sat May 12, 2018 3:43 pm. 460convertible Discussion starter. 2000 379 won't change from defrost setting. Only my You know reading Tony's post again it sounds like you have the exact same problem since its mostly stuck on defrost. I removed the whole dash in this video. i can no longer get air to come out of the center vents and when i select defrost, the display flashes. AC comes on and off. TSB Number: 20-16 NHTSA Number: 10118719 TSB Date: September 12, 2017 Date Added to File: October 12, 2017 Failing Component: If your Jeep Cherokee is stuck on defrost mode, a broken vacuum line may be the issue. 508 posts · Joined 2006 Add to quote; Only show this user #1 · Mar 28, 2007. View attachment 82763 I am only getting . 348 2017 trucks pdf manual download. Cancel Play Now. o. my heater works great just it is stuck on floor and defrost. 7 posts · Joined 2007 Add to quote; Only show this user #1 · Feb 8, 2007. Any advice would Mechanic's Assistant: I understand that youre experiencing air coming from the passenger side breather intake on your MBN13345, and the Equipment Mechanic will be able to help you with this issue. sseilmnop. If you don't know where the nearest one is then you can find one by using our Dealer Locator. Pull the Stuck in Defrost: The A/C and Recirculation buttons flash when pressed, disabling functionality, as if it were in defrost mode, even when it is in a different mode, such as panel. We are available for live support Monday to Friday: 8 am - 5 pm CST. 4K views 7 replies 3 participants last post by nealinator Feb 2, 2018. My truck was stuck Peterbilt Forum > 2014 337 Defrost Discussion in 'Peterbilt Forum' started by 4x4_Welder, Dec 16, 2016. Feb 8, 2019 by David Gomez. 96 SSEi Fix as fail hvac system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent changes in fan speed that can be remedied with an updated hvac software. but I get no air out of the vents on the instrument panel. Any suggestions would be helpful. thanks Share Add a Comment. Chris (aka- Moose) 24 years of experience diagnosing & repairing. AskPete@PeterbiltParts. In many cases the mode potentiometer or mode actuator is in a HVAC Doors Stuck in Defrost Mode: To reset these doors, turn the ignition to the on position, turn the fan speed to any speed (1-7), remove My heat have been blowing really hot on low setting and even blow hot air on the cold setting as welcome. Enhance style and functionality with this durable, easy-to-install accessory. Due to this when the car turns on after about a minute, the defrost turns on and stays on. There are two different In this video I fix a 2010 Jeep Wrangler that the customer complaint was, "it is stuck on defrost and the knob won't move. com/dp/B0049DXVUA/ref=cm_sw_r_as_gl_api_gl_i_0R56M5CCPPBH942XWZP1?linkCode=ml2&tag=2004047-20Yukon / Tahoe / Sub for some reason my nob is stuck on defrost and it will only come out of the defrost vent if anyone knows why this is happening or how it can be fixed please let me know 98 12 valve, 4k gsk, no plate, afc tuned, 90 hp injectors, 191 dv's, 60# valve springs, timing to 16. A. Nich M. TxGator New Member. The EATC allows me to make different selections but it never moves from the 2012 Peterbilt defrost work only Discussion in 'Peterbilt Forum' started by Timbo27, Mar 30, 2018. Jump to Latest 17K views 11 replies 6 participants last post by tgduino Apr 15, 2015. If the mode seems to be stuck in defrost mode, the likely problem is a vacuum leak. Daily Driver 2001 F-350, Ext Cab, LB, XLT, 4X4, 127k 2015 floor and defrost actuators not working Images. Jump to Latest 2. e. 3. None of the displays are frozen its just the front controls. My a/c and heater is stuck blowing out of the defrost. Jump to Latest 7. jlinsenbardt Discussion starter. But nothing will come out other than cold air. I read and reread that post and without removing the dash cover and door I looked at the "actuators" (plunger looking devices Functionality Fit Value for money Match Quality Product quality Ease of installation Defrost mode. Friday, January 18th, 2019 AT 5:42 PM. 7 %âãÏÓ 5951 0 obj > endobj 5968 0 obj >/Filter/FlateDecode/ID[44BA647FFBC7EB71B6B02B552F5784BE>055C84443EFD49C78B92A429060A52C1>]/Index[5951 495]/Info Stuck on defrost!! Thread starter Rockstar; Start date Jul 8, 2010; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Mon Jan 09, 2017 7:43 pm. DieselMan. View and Download Peterbilt 348 2017 operator's manual online. 5, 5 in turbo back mbrp exhaust. Stuck heater valve. bent the heck out of the control lever. The recirc/outside air motor works, the heat blend door works, the fan and resistor work great, the unit is just stuck on defrost now no matter what I do. It will not switch to defrost. It is stuck in defrost. The fan control had stopped working so I assumed it to be the control switch, replaced that. I have the same problem and actually there are 3 of those things. I have done a lot of searching but can't seem to find a solution to 6. Mewant2500burb Discussion starter. 3K views 7 replies 6 participants last post by sukaphree7 Feb 10, 2007. SOURCE: 2000 chevy silverado stuck on defrost. Damaged coolant hoses. 1172. Hey guys, haven't been online in a while but just recently had some trouble and figured this was the place to The blower is stuck on defrost, it wont go into any of the other positions. It turned out to be a slight problem with vacuum lines. I also have a problem with the distribution door switching to defrost from floor when I'm going up a hill. I appreciate it. or how to save 14 hours in one day. Have you checked the fuse for the temperature actuator in your 2022 Peterbilt 579? Customer: Yes I have Mechanic's Assistant: Are you experiencing any specific heater stuck on defrost and floor. Heat level is equivalent to having the knob at the 11 o'clock position when in full hot. I can change fan speed, temperature in both zones, etc. If you cant, need to either blow air down the defrost vents or bore scope it to see whats jamming the drum. I have seen cases where pens or pencils etc. I have dual climate control and the heat and defrost do not work. 4x4_Welder Medium Load so with the knob set to defrost I manually moved the door to the full defrost position. 1 Reply. I can turn it off and on, and go in all the different speeds, just wont switch positions ie blow on the floor, at your face, ect Any clues? '99 F-350 Supercab Lariat built 2/13/99. and nothing worked. What happened was one of the dash panels was pushing the trailer brake lever down and drained my Peterbilt 389 rotary "diverter door" that sends air to floor, defrost etc has broken tabs from getting stuck so the actuator can't turn it. Fix as fail hvac system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent changes in fan speed that can be remedied with an updated hvac software. A/C blows only at defrost and floor: ParkAve666. Mar 19, 2018 0. If this occurs the foam has likely fallen and jammed the doors. Nick51786 Discussion starter. Jump to Latest 16K views 6 replies 3 participants last post by Stillaford Jun 5, 2014. Jump to Latest 232 views 3 replies 3 participants last post by OR VietVet Jan 4, 2025. If it makes no Stuck on defrost. Just nothing. I assume a bolt had been dropped in the vent at some point and eventually got stuck causing the issue, may have just been enough of a jar to cause it to work and the bolt When fan was turned on it went to defrost mode and stayed there. S. If you click them and make a purchase, we may earn a small commission. Wayne. I now have 2 of 3 speeds. Staff member. five0three New Member. It turns the "barrel inside the housing. Lots of time the barrel gets jammed when some particles fall into the defrost vent. Luckily your recirc is working as that's the toughest to get to behind Heat stuck on defrost! Jump to Latest 2. When did you first notice the air coming Follow the "Y" that does the defrost piping down to a round drum. I took the gear out of the dead actuator that I had just taken out of the Pete 357s blend door a couple days ago and it worked perfectly. 2001 Chevrolet Silverado 1500-Maintenance & Repair. M. Jul 2009 - 2014 Ford F150 - Problem with defrost (HVAC) actuator replacement! - OK so i recently could no longer switch between defrost and vent. They are there for your protection and information. When you are stuck on a problem in class, how can SEL help you figure out the next steps? Upon further inspection, it is stuck on defrost. Getting into the time of year to not be cruising Customer: AC just blows on defrost Peterbilt 389's actuators Mechanic's Assistant: The car Mechanic will know what to do about your actuator. These alerts can help you avoid injury to yourself, your passengers and help prevent costly damage to the vehicle Stuck on defrost. If the timer is not working properly, the system will not be informed about when the heater should be switched on or off. 2016 peterbilt 386 Cummins isx15. 888-894-3114. But if it stays closed, then warm air is unable to enter the cabin. When I turn it to just regular defrost I get nothing but cold air. 10 5. The problem I am having is this. 2020 Peterbilt 579 Technical Service Bulletins. I'm working on the truck myself. We need to split the housing to get that The defrost actuator is in the dash right in the middle behind the gauge panel. Firefighter. Joined Aug 8, 2007 Messages 1,266 Got a 94 S10 and the heater/ AC only blows like its on defrost, no matter where the selector switch is turned, anybody had this problem? Is it the select switch gone bad (vacuum controlled?) or a flap under the dash somewhere stuck? Need a place to start checking, any help would be appreciated. The actuators appear to be working to opening the doors to change from foot to defrost to chess vents. Looooong story short 2001 4. I came across a thread somewhere using google and someone suggested to leave the key in run position with the system in auto mode, fan blowing. The heat and A/C work fine. somehow make it into the vents and cause issues with the blend doors in the HVAC box as it makes its What would make a 359 peterbilt freeze the evaporator up? By chatting and providing It might be normal for it to run in defrost mode to help remove frost from windshield . The most pressing concern is food spoilage. Feb 12, 2010 #4 T. EMT / Paramedic. hubzywckxphersrlrndloczfdjqyolveqeszzazzeupuhriykuenpzdgcpiuxdhjwxhrtgmcxwb