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1995 Chevy Tahoe ac heater control not working

Blower motor is working fine all speeds, seems no power to controller, as recirculation is also not working. seems issue somewhere as ac compressor stays on evne after key is turned off and kills battery. Replaced AC relay but the switch for the different selicetions is not working (vent, floor, ac, etc)

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: AIR FLOW STUCK IN DEFORST VENT WILL NOT SWITCH TO FLOOR OR AC VEN

I found a broken vacuum hose on top of the intake which runs the controls

Posted on May 30, 2009

keemo68
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SOURCE: 2004 Chevrolet Silverado Heater/AC Blower on without Ignition ON

there is no relay for the heater fan it's a 15 amp fuse and is on the accessories circuit. the reostat is responsible for all 3 speeds .with the key off there should be no voltage to the blower motor whether the fans speed fan switch is on or off. the fuse will be located in the fuse paneleither on the drivers left side in the dash or underneath the dash in the fuse block. you have a short in the harness that is under the dash and most likely it's a bad plug on the harness. your going to have to do some searching but that's where the problem short is... please rate

Posted on Oct 04, 2008

  • 124 Answers

SOURCE: heater control 98 chevy s10 blazer

These trucks have a problem where moisture builds up in the heater box then freezes. When this freezes and you change your heater settings it breaks the shaft for the blend door. If this is what happened you should be able to look under the dash above and to the right of the gas pedal and you will see two vaccuum accuators one of them you should be able to wiggle around the linkage if it is broke. To fix this you need to remove the entire dash to get the heater box out which involves discharging the AC and draining the coolant because the heater core and evaporator come out. Please rate.

Posted on Dec 13, 2008

  • 11 Answers

SOURCE: Heater/ac switch speeds 1 and 2 don not work in 99 Silverado

you need a resister found under your air duct by the passenger floor under dash board auto zone sells these for about 25.00 you may as well buy cabin air filters while your at it . 1 of the screws will be a pain to install back into the duct work I left mine out didn,t make a difference . you might have to order it as they are a comman item oh you will need a vacuum to clean up mess from cabin air filters .this is not a hard job .

Posted on Feb 28, 2009

  • 3600 Answers

SOURCE: No power for AC compressor

try removing the plug off the low pressure switch on the accumalator plug a paper clip into the plug and turn ac on if it comes on then your low pressure switch is bad or your low on refigerant.

Posted on May 28, 2009

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1 Answer

I have a 2003 Chevy Tahoe . The heater and a/c fan only works on the highest speed #5. How do you repair this problem?


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When i press the ac button it blinks three times but does not turn on. 2007 Tahoe LT


If your vehicle is equipped with automatic climate control, this should help.

Recirculation Operation
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