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At my work we have Chevy astro vans ranging from 99-03 and all six had this same issue. We finally figured out that the 1/8th vacuum line from the manifold that feeds the hvac selector switch was broken. Once we fixed that line the problem was solved. I hope this helps.September 2010. I have a 05 chevy trail blazer whereby I hear a resonating, tuning folk-like sound coming from the right, passenger side dash of the vehicle. This sound is very low and intermittent. It is heard when the AC is on. The blower blows cold air after about 3 to 5 minutes of being turned on.Ac not working at all I had paid someone to change out my factory stereo in my 07 chevrolet trailblazer. When i left i tried using my a/c and nothing was blowing out of the vents at the top. I've tried getting a new a/c control module, replaced it and it still didn't work at all. I disconnected the battery along with the hvac fuses for 30 seconds.At the simplest level, there are two main reasons why the heater is not working. If it's not coming on at all, it's usually either the blower motor or some other wiring issue. If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself.I have a 2002 Trailblazer LS. And for some reason, even when my right AC knob is turned all the way to the left (which should be dash vents only) it blows air from both the vents on the dash >and< the floor vents.And sometimes, when the knob gets turned back and forth to change modes it wont actually turn the dash vents on at all.It …Hello, I am experiencing the same problem with no ac discharge from center vents after battery disconnect. ... Disconnected my battery and vents stop working. I waited a cople months dealing with the a/c coming from the defrost and floor vents. ... 2006 chevy trailblazer_ss_3ss Joined May 30, 2006 · 30 Posts ...If you are experiencing low beam not working on a Chevy Trailblazer, there are a few different ways to fix the problem. 1. Headlight Bulbs Are Broken or Burned-Out. If your low beams are out and the high beams work fine, it’s very likely that both your halogen low beam headlight bulbs have just burnt out.Feb 8, 2023 · The 2008 Chevrolet Trailblazer has been known to have issues with the air conditioner. The most common problem is that the air conditioner will stop working altogether. Other issues include the air conditioner not blowing cold enough, or only blowing out hot air. There have also been reports of strange noises coming from the air conditioner. christo829 said: The floor/dash vent mode actuator is one unit that controls. whether the air comes out the floor vents or the dash vents (towards. your face). The defrost actuator is separate, and that's the one that. directs air flow against the glass. If I'm understanding you correctly, your dash vents are working, but.First, check the condenser to make sure it's not blocked by any debris. Inspect the cabin air filter (if equipped) to verify that it is not clogged. Determine if the blend door is moving. Check the system pressure. If it's low, you'll need to charge it and find out where the leak came originated.The most common reasons a 2005 Chevrolet Trailblazer ac isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. 0 % 37% of the time it's the2004 Chevy Trailblazer....heater control doesn't switch from upper to lower vents and stays on floor setting and.AC only - Answered by a verified Chevy Mechanic ... I have a 2003 Chevy s10. The heater is not working. The blower works and the heater core is not leaking. ... The front vents do not blow air, but air does come out of defroster ...Step-by-step guide on how to install / remove / replace middle dashboard air vents on Chevy Tahoe ( 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | P...Maybe it just needs to be recalibrated. Go to the rear fuse box and pull the HVAC-B fuse for about 10 seconds and put it back in. Then turn the key to RUN but don't start and don't touch anything on the HVAC until it has finished recalibrating the actuators.The heater / ac control only works with one or two desired settings.defrost will not work at all (2006 chevy trailblazer) The actuator motor that controls the defrost,to floor,to vent ,has gone out,this will be a job to take to the shop,the dash will have to be pulled out toward the seats to replace the actuator motor.i have a 2006 chevy trailblazer that wont blow air form the upper vents, blows from defrost, and floor,,,,i was told it is a faulty blend door actuator or a mode door actuator. but which is it im comf ... The dealer just replaced the instrument cluster and now the top vents are not working.May 21, 2007 · Same thing happened here. Everything was working fine until I replaced the battery. After that the air only blew from the defrost and floor vents. I disconnected the battery (no help), tried the hvac reset (no help), I finally had to replace the mode actuator. Seems like this is a cronic problem for GM, like everything else.

heater blows cold air A/C stopped working heater core engine complaint electrical issue heater complaint transmission complaint paint defect Trailblazer recall. Maximize. The 2004 Chevrolet ...I have a 2004 Trailblazer. The A/C vents on the floor and the defrost work, but the dash vents do not unless I pull the HVAC B fuse inside. Of course then it blows hot air, but that's the only way air will come from the dash vents. Any suggestions of what I could check next?2003 trailblazer - heat not working, blows cold air. ... 2002 Chevy Trailblazer LTZ is blowing HOT air from driver's side vents 7 Answers. HELP! What could be causing the air conditioning unit (this vehicle has dual climate controls) to suddenly be blowing HOT (too hot to leave vents open) air from driver's side vents, but passenger side...Car AC Blows Cold on One Side and Hot on the Other - Diagnose and Fix. Description. If the car AC blows cold air on one side and hot on the other, there are a few different causes but it's likely the blend door actuator, also known as the temperature blend door actuator or vent mode door actuator. Author. 1A Auto Team.

A technician will diagnose your Chevrolet Trailblazer heater using the symptoms you report as a starting point. Because your Chevrolet Trailblazer heater is a complex mechanism that uses an electric fan to blow air through a heater core that is heated by the engine coolant, the problem could be electrical, mechanical, coolant-related, or a …The most common causes for AC fan blower motor not working in Chevy TrailBlazer are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.No happy medium. - vblazer , Pc, FL, US. Maximize. The 2002 Chevrolet Trailblazer has 13 problems reported for fan switch doesn't work on all settings. Average repair cost is $540 at 89,800 miles.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. 2006 chevy trailblazer_ls Joined Feb 25, 2008 · 3 Posts #90 . Possible cause: I have a 2003 chevy trailblazer, the dash vents will not produce air flow. I saw the fix .