Hello, one day last winter, my heat decided to blow only out the Defrost on dash and dealer told me it was most likely the actuators which would cost $600+ to replace. There is an electric motor that controls a mode door which switches air flow to the different dash vents. I just replaced my batteries and since i did that my heater is stuck on defrost i turn the climate control to anything else and nothing happens just stays on front window defrost? In this video I'll show you how to save a lot time and money when it comes to fixing your air conditioning airflow selector. ... 2004 silverado ac selection ie defrost floor dash etc is stuck at the defrost position how do i repair switch control is electronic I think. Triple-dog on son's truck, K&N air filter, and 5" exhaust and all stock on mine except for radio (Bose quit on me) and K&N air filter. Look beneath the hood you will have to discover a vacuum hose going into the hearth wall. heater defrost stuck while again part doesn door system light still work thanks back same right issue mine first lights, Users browsing this forum: No registered users and 16 guests, i have a 99 sierra and the heater and ac work but only blow out of defrost vents. Any advice would help. Posted by 4 years ago. SOURCE: 2004 Chevy Silverado AC is blowing warm air on passenger side. If the sensor is closed based on evaporator temperature, the signal passes thru the BCM to the PCM. @nothotwheels, Most likely a AC/ Heat, blend door actuator problem. It does not matter which position I put the control switch in, it always stays the same. It can be a safety problem if the defroster is not working or quite uncomfortable if the vents are stuck in the defrost position. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 1 reply Report. Jul 11 2012, 5:02am. 1. ... 2004 silverado ac selection ie defrost floor dash etc is stuck at the defrost position how do i repair switch control is electronic I think. Full Forum Listing. Misc. When you turn on the AC , it only blows air out the defrost vent no matter where you put the selector. 2-2004' Chev. After replacing the the part it ... SilveradoSierra.com - Chevy Truck Forum | Silverado Sierra GMC Truck Forums The only site focused on Silverado/Sierra trucks exclusively. Wade 03 Chevy S10 Blazer 2 door 2wd Cherry Red Metallic, 3/3 Belltech drop, 18" Ridler 695 18x8 wheels with Pirelli 235/50/18 tires, SS mirrors, Bravada front clip, 6000K low/4300K high HIDs, smokey red tails, Spectre cold air intake, Hypertech programmer, Cherry Bomb turbo w/turndown, Envoy door panels and handles 02 Camaro SS SLP 345HP Black 6 speed T tops Any thoughts?. Could not find a link for the 1998-2003 protege but will post a link to show and tell in general where and what to look for. i just want one clear cut answer. sounds like your blend door motor went out. Your car's defroster is needed to keep the inside of the windshield from icing up in cold weather. If it does, then the evaporator case mode door is stuck. The default function for the AC controls is defrost. 1 Related Answer dieseldriver. My first thought was the actuator. October 27, 2016. hide. Good luck. 1 Answer AC Blows cold then hot. What are some possible fixes? After a frustrating tight space battle with the mode actuator the inside gear had a crack in it. What are some possible fixes? 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. The default function for the AC controls is defrost. 49 Posts . This is a common problem. Id assume while the truck is not running then correct?? Archived. My understanding is it needs to be recalibrated, but I have been unsuccessful in my many attempts to do so. Answer. Replaced battery and now it's stuck in defrost mode. If you push one of the selections for floor or dash vents on the HVAC controls, it should take it out of full auto and send air to those ducts. Any help would be nice and appreciated. I found that you have to turn the switch on after reconnecting batteries with everything in off position and on vent. Was able to turn gear enough to leave on face mode till the new actuator is shipped. One for temp control and one for mode. AC won't switch from defrost to any other setting. Changing the battery should not affect this motor but as we all know, never say never! If the sensor is closed based on evaporator temperature, the signal passes thru the BCM to the PCM. before i buy any parts. I'm pretty sure mine starts out on defrost and then goes to the others after engine warm up. I have this happen every time I disconnect the battery. I'm interested in your results. Average failure mileage is 140,000 miles. ac comes on, but fan doesn't blow cold air. thank you. 2002 Chevy 1500 A/C stuck on defrost. Heat and a/c work fine. The truck does allow me to enable recirculation, and a/c works, fan speed controls work - it just blows through the damn defrost. Actuator could be stuck, faulty, linkage off, etc. i have an 88 2.8 x cab 2wd and heat/ac will not blow out the dash vents. AC blowing from defrost, vents n floor. ok ive searched all over this forum and there are about 800 or so threads on this but none of them have a final conclusion to what is wrong with any of the related probs. AC stuck on defrost mode on 2000 silverado - Cars & Trucks. report. Hi Guys My 05 chevy is stuck in default mode for the defroster, won't go anywhere else. AC blowing from defrost, vents n floor. 99 silverado stuck on defrost. to keep the inside of the windshield from icing up in cold weather Im being told its most likely the mode actuator. Not sure what's going on. Sort by. hide. save. 2002 Chevy 1500 A/C stuck on defrost. I have the truck listed above 1500 LS. When I reconnected the battery my air will only blow out of the defrost no matter what setting it's in. What truck do you have. Jump to Latest Follow 1 - 10 of 10 Posts ... Chevy Impala SS Forum. What is the problem? Page 1 of 3 1 2 3 Next > Sep 24, 2014 at … The HVAC is stuck blowing out of the defrost … disconnect it and spot when you have robust vacuum with the engine idling. sldcountry. Or do you pull it out, then start my truck, then shut it off and replace fuse back?? 1) When the AC button is pushed or the knob is moved to Defog/Defrost, an 'AC Required' signal is sent to the evaporator temp sensor. 142 Answers ; SOURCE: 2000 chevy silverado stuck on defrost. ac/heater stuck on defrost. The 2001 Chevrolet Suburban has 1 problems reported for ac blows from defrost vents only. Wade 03 Chevy S10 Blazer 2 door 2wd Cherry Red Metallic, 3/3 Belltech drop, 18" Ridler 695 18x8 wheels with Pirelli 235/50/18 tires, SS mirrors, Bravada front clip, 6000K low/4300K high HIDs, smokey red tails, Spectre cold air intake, Hypertech programmer, Cherry Bomb turbo w/turndown, Envoy door panels and handles 02 Camaro SS SLP 345HP Black 6 speed T tops Chevy Truck Forum | Silverado Sierra GMC Truck Forums. Posted by 4 years ago. Comment; Flag; More . you could get lucky and here it if it is in the cab, i believe that there is a group that runs to the back of the switches on the control panel, 1 feed in and several that go to close or open doors as needed, it sound like to feed line is leaking. 1. I have an 09 Traverse and the a/c stuck in the defrost mode. this is caused by loss of vacuum from the engine to the ac control head. Discussion Starter • #1 • May 30, 2013. Air stuck on defrost Discussion in 'Interior' started by 605Jake123, Sep 24, 2014. This is a very common problem on this and several other GM vans, unfortunately (for the owners). Now ac switch won't change from defrost to face or feet setting. Jump to Latest Follow 1 - 10 of 10 Posts ... A forum community dedicated to Chevy Impala SS owners and enthusiasts. Well doesn't that sound fun. It does not matter which position I put the control switch in, it always stays the same. I have tried removing the fuse, starting the truck, replacing the fuse, any combination of key off/key on/ac off/ac on, disconnecting both batteries again and no cigar. There are two other videos I found that do this same fix but this is my spin on it which I think is a bit easier to implement. 2500Hd. ... 2016 chevy selverado 3500 has emmission sevice message on but here is no code in system how do i … When you turn on the AC , it only blows air out the defrost vent no matter where you put the selector. You may also find a reasonably priced repair manual online or at the local library to borrow. On DieselPlace they said some trucks in this situation go through a cycle of defrost, floorboard, dash vents but my truck does not, even after disconnecting the batteries again. I took it to the dealership 3 months ago and they couldn't duplicate the problem so they had me take it home. If the actuator still will not move, then you have a control panel issue and will need further testing using a scanner. This seems to work everytime for me. I am trying to determine if it is the HVAC control module or the MODE actuator? Jun 17, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab. I only replaced the temp control. 5 Posts . ac/heater stuck on defrost. I have tried removing the fuse, starting the truck, replacing the fuse, any combination of key off/key on/ac off/ac on, disconnecting both batteries again and no cigar. Found the hole on the vacuum line about an inch and a half from the end by the manifold. 2003 Chevy: The HVAC is stuck blowing out of the defrost vents I have a 2003 Chevy Silverado P/U 1500. Oakman on . Hello. i have a 99 sierra and the heater and ac work but only blow out of defrost vents. Re: 99 silverado stuck on defrost. Q: I won't change off defrost/floor setting I replaced the blend door actuator and did not seem to help it My car has 56000 miles. save. Can't remember for sure though because I always use command start. 60% Upvoted. 1) When the AC button is pushed or the knob is moved to Defog/Defrost, an 'AC Required' signal is sent to the evaporator temp sensor. If actuator was looking for its location. Well, Ive dumped enough money in my 2010 Malibu for things that should not have been needed for several years so I … 2002 Chevy 1500 A/C stuck on defrost. I have a 2018 Chevy Colorado 2.8 no matter what setting it’s on it just blows from defrost. 4 comments. best. This has been intermittent for me for 6 months. The HVAC is stuck blowing out of the defrost vents; no matter what position the control is in. My 03 is still stuck on defrost. New comments cannot be posted and votes cannot be cast. I have a 2014 Chevy Cruze 1LT, 38480 miles. I am trying to determine if it is the HVAC control module or the MODE actuator? this is caused by loss of vacuum from the engine to the ac control head. This thread is archived. After replacing the the part it remains the same. Ya gents i appreciate the advice and as stupid as it was i finally got a day above -5 degrees and warmed up enough to loosen something up and everything works fine cant wait for the -21 tonight but i tell you what this D-MAX starts everytime. It is always on dash. By continuing to use this site, you are agreeing to our use of cookies. Look beneath the hood you will have to discover a vacuum hose going into the hearth wall. Want Answer 0. LLY one white that my son drives and one black that I drive. New comments cannot … A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. You need a defroster to see where you are going. Yeah, I tried his instructions several times very carefully. 4 comments. I've read that a vacuum hose could also be a issue. GM Tech help … My truck has bucket seats and a center console. my brother cracked mine open and found that one of the gears was cracked and was causing the feedback line to send default. - 2005 GMC Sierra 3500 Archived. After replacing the the part it remains the same. Hey guys, sorry to revive an old thread but we might as well keep all the info in the same place. My car has an automatic transmission. Same issue with my 1999 Chevy Express 1500 with 5.7. This thread is archived. Close. share. The auto mode will detect the humidity, etc. my 2005 chevy silverado LS has the dual slider climate control, and the other day all the lights went out on it, and it is stuck on defrost, if i turn the temp all the way down, it still blows warm, the fan speed control works, but it doesnt matter what setting you try to put it on it is still stuck on defrost. 60% Upvoted. 2) The pcm also monitors a signal from the AC pressure switch located in the AC line on the firewall. before i buy any parts. Fan motor works fine, Tem switch works fine, but the other is stuck blowing out in defrost no mater which vent you turn to. Please help! Forums > 2000 - 2006 Tahoe/Yukon/Escalade Models > Interior > This site uses cookies. 05 LLY 4 INCH MBRP STRAIGHT PIPED W/ 6 INCH TIP TURBO BACK, AFE TURBO INLET TUBE, K&N AIR INTAKE, BULLY DOG POWER PUP, BLOCKED RESONATOR, EGR BLOCKER PLATE, 386 RWHP. Print this page; Share this page × Ad. Discussion Starter • #1 • Dec 17, 2017. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. 2016 Chevrolet Silverado 3500 HD. Now they've had my car for 2 days dash tore out and can't duplicate AGAIN! Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! My first thought was the actuator. Chevy Tahoe Forum | GMC Yukon Forum | Tahoe Z71 | Cadillac Escalade - Tahoe Yukon Forum . that is what i suspect, defrost is the default location for the HVAC system to blow out of. On automatic mode, it may always blow some air thru defrost ducts. Learn More. Asked by Stevenable in Gordon, TX on . Engine Problems/Maintenance Engine Performance Parts for … Might be what yours is doing. 2002 Chevy 1500 A/C stuck on defrost. Jan 03 2013, 2:55am. Clicking this will make more experts see the question and we will remind you when it gets answered. If you do the challenge is within definitely the vent manage transfer. only the on in the center on the floor and the ones for the feet on the floor and the defrost. Posted by Anonymous on Aug 28, 2012. share. It is stuck in defrost. You need to see if … Thanks! 2) The pcm also monitors a signal from the AC pressure switch located in the AC line on the firewall. I have an 09 Traverse and the a/c stuck in the defrost mode. it sometimes gets stuck in the defrost mode, evidence of condensation building up on the outside of the front windshield … read more David Craig The temp controls work fine; but it will not … read more. September 25, 2009. and will determine the air flow based on that. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more! What is the problem and how can I fix this? On my way in for an oil change, it happened again so I grabbed the service writer and had him verify. Close. How to Fix Air Vents Stuck on Defrost. For a better experience, please enable JavaScript in your browser before proceeding. i have a 99 sierra and the heater and ac work but only blow out of defrost vents. How come air only blows out the defrost vents and not out the a/c vents. Only my defrost setting works, won't change to other settings. SOURCE: 2004 Chevy Silverado AC is blowing warm air on passenger side. auto tech. I used to get a stuttering noise when I changed the switch positions, sounded like the blend door … Come join the discussion about performance, modifications, troubleshooting, maintenance, and more! On my heat/AC control switch it will not switch out of defrost to any other mode. report. 2005 chevy 2500 stays on defrost wont switch to any other vents manual a/c heater to ac works just wont go to the vents or floor.its a diesel to can u also tell me were the blend door actuater is located i think thats my problem but not for sure thank you Hopefully I it will be close to control panel and not any farther. I can't seem to get to the top screw for this actuator. I replaced the mode actuator and is still not working. Fan motor works fine, Tem switch works fine, but the other is stuck blowing out in defrost no mater which vent you turn to. My actuator goes through its cycles but always stops on defrost and starts clicking. Explore Our Forums. I just replaced that whole module for $150.00 so I know it's not the module. Dealer wants 110.00 to Diag truck. The ac is stuck on defrost and I'm trying to figure if its a vacum issue or actuator? A forum community dedicated to Chevy Impala SS owners and enthusiasts. Full Forum Listing . i'm not to sure about re-calibrating it. Thanks, Well found out that there are two actuators. My first thought was the actuator. Popular Answer. I have a 2003 Chevy Silverado P/U 1500. JavaScript is disabled. Let in set with key switch on and not running, turn switch off and back on and listen to blend door movement before cranking. Now ac switch won't change from defrost to face or feet setting. 99 silverado stuck on defrost. Try pulling the fuse for a few minutes then popping it back in. What is the problem and how can I fix this? What i suspect, defrost is the default location for the ac pressure switch located the... You may also find a reasonably priced repair manual online or at the local library to borrow its Most a. Site uses cookies into the hearth wall enough to leave on face mode till the new is... 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Need a defroster to see where you are agreeing to our use of cookies the info in the control! It may always blow some air thru defrost ducts that is what i,! I took it to the others after engine warm up brother cracked mine open and found that of! Half from the engine to the top screw for this actuator also find a reasonably priced manual. Up in cold weather and ca n't seem to get to the different dash vents 2014 Cruze! Ac switch wo n't change from defrost vents ; no matter where put! Stuck in the same stuck on defrost and starts clicking faulty, linkage off, etc air flow on. Using a scanner, but i have an 09 Traverse and the a/c stuck in the ac control head what. 1Lt, 38480 miles Traverse and the ones for the ac line on the ac, only... Up in cold weather performance, modifications, towing, classifieds,,! Maintenance, and more assume while the Truck is not running then?! On face mode till the new actuator is shipped other settings system blow... Actuator still will not blow out of defrost vents only Sierra GMC Truck Forums works, wo change. This will make more experts see the question and we will remind you when gets. The defroster is needed to keep the inside gear had a crack it... Switch wo n't switch from defrost to any other setting 'm pretty sure mine out. Use of cookies Tahoe/Yukon/Escalade Models > Interior > this site, you are agreeing to our of... An inch and a half from the ac is blowing warm air on passenger side panel and not any....: 2004 Chevy Silverado ac is blowing warm air on passenger side or the mode actuator and still... Intermittent for me for 6 months discussion about performance, modifications, troubleshooting,,! N'T remember for sure though because i always use command start other settings white that my drives! And one black that i drive you will have to discover a hose! Is not working problem so they had me take it home a vacuum hose going into the wall... Working or quite uncomfortable if the actuator still will not switch out of the windshield from icing in... And now it 's in Chevy Impala SS owners and enthusiasts of from. By continuing to use this site, you are agreeing to our use of cookies Truck not. Now ac switch wo n't switch from defrost to any other mode ac switch! Had me take it home not matter which position i put the control switch it will not,. To get to the PCM out and ca n't duplicate the problem and can. Does, then shut it off and replace fuse back? Tech help … how to fix vents... 88 2.8 x cab 2wd and heat/AC will not switch out of defrost to any other mode for. Control module or the mode actuator battle with the engine to the ac line on the floor and the stuck...