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 I have an 09 Traverse and the a/c stuck in the defrost mode. Average failure mileage is 140,000 miles. 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. to keep the inside of the windshield from icing up in cold weather My first thought was the actuator. 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. 49 Posts . If it does, then the evaporator case mode door is stuck. Sort by. Page 1 of 3 1 2 3 Next > Sep 24, 2014 at … 142 Answers ; SOURCE: 2000 chevy silverado stuck on defrost. before i buy any parts. it sometimes gets stuck in the defrost mode, evidence of condensation building up on the outside of the front windshield … read more David Craig Misc. After a frustrating tight space battle with the mode actuator the inside gear had a crack in it. Fan motor works fine, Tem switch works fine, but the other is stuck blowing out in defrost no mater which vent you turn to. What are some possible fixes? October 27, 2016. Popular Answer. 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. i just want one clear cut answer. It can be a safety problem if the defroster is not working or quite uncomfortable if the vents are stuck in the defrost position. The auto mode will detect the humidity, etc. Air stuck on defrost Discussion in 'Interior' started by 605Jake123, Sep 24, 2014. 1 Related Answer dieseldriver. The HVAC is stuck blowing out of the defrost … i have a 99 sierra and the heater and ac work but only blow out of defrost vents. Any thoughts?. For a better experience, please enable JavaScript in your browser before proceeding. If the sensor is closed based on evaporator temperature, the signal passes thru the BCM to the PCM. I have a 2018 Chevy Colorado 2.8 no matter what setting it’s on it just blows from defrost. 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. It is stuck in defrost. 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. My first thought was the actuator. 1. Discussion Starter • #1 • Dec 17, 2017. Posted by 4 years ago. What are some possible fixes? What is the problem? i'm not to sure about re-calibrating it. 60% Upvoted. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. I have a 2003 Chevy Silverado P/U 1500. One for temp control and one for mode. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! ac/heater stuck on defrost. 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. share. Forums > 2000 - 2006 Tahoe/Yukon/Escalade Models > Interior > This site uses cookies. I am trying to determine if it is the HVAC control module or the MODE actuator? A forum community dedicated to Chevy Impala SS owners and enthusiasts. 2003 Chevy: The HVAC is stuck blowing out of the defrost vents I have a 2003 Chevy Silverado P/U 1500. Found the hole on the vacuum line about an inch and a half from the end by the manifold. hide. 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. The temp controls work fine; but it will not … read more. 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. The truck does allow me to enable recirculation, and a/c works, fan speed controls work - it just blows through the damn defrost. I have a 2014 Chevy Cruze 1LT, 38480 miles. 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. I am trying to determine if it is the HVAC control module or the MODE actuator? Thanks, Well found out that there are two actuators. Not sure what's going on. If the actuator still will not move, then you have a control panel issue and will need further testing using a scanner. LLY one white that my son drives and one black that I drive. If the sensor is closed based on evaporator temperature, the signal passes thru the BCM to the PCM. Discussion Starter • #1 • May 30, 2013. Try pulling the fuse for a few minutes then popping it back in. 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. Any help would be nice and appreciated. Explore Our Forums. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. Might be what yours is doing. This is a common problem. This has been intermittent for me for 6 months. my brother cracked mine open and found that one of the gears was cracked and was causing the feedback line to send default. ... 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. Please help! 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 Answer. Clicking this will make more experts see the question and we will remind you when it gets answered.