Question about 2005 Chevrolet Impala
I think something is just loose, but not sure. The temperature is still cold or hot depending on the setting you use, however the fan doesn't work. When I am on interstate and set it to vent, sometimes it comes on. However with the heat it never turns on. When I go long distances, enough heat comes in to knock of the chill and keep the windshield defrosted. I have tried to buy a potable heater in the mean time as I have two small kids, but the ac outlet in back shorts out? HELP!
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Posted on Jan 02, 2017
It probably is the fan switch itself. They are around $30. for a new one. You can take it out and check to see if you have power to all the settings with a ohm meter or test light. They are not real hard to take out.
Posted on Jul 28, 2009
so it not the thermostat it could be that ur radiator is low on anti freeze or u have a bad switch on ur panel i tsuggest u check u check ur fuses cause they are known to cause this problem in GM products it a safety feature but it can cause problems
Posted on Nov 15, 2008
HVAC control head problem or it is the air Temp Control Valve problem. THe control head is the one with the buttons and knobs and the control vavle is located on the HVAC carrier assembly underneath dashboard (two of them one on left and one on right in center). This is a job for someone who has knowledge of HVAC and electrical on a GM vehicle.
Posted on Aug 02, 2009
This sounds like a vacuum control problem. Check on the top side of your engine (Manifold or throttle body area) for the vacuum feed for the heater controls. You will find a plastic vacuum line that goes thriugh the dash. Follow this line from the engineto the firewall. Somewhere along this line you will find a check valve. Replacing this check valve should fix your problem.
For verification that this COULD be the problem do this: drive the vehicle and make a point to notice whether this switching is taking place while the vehicle is under moderate to heavy acceleration. If this is the case, the check valve is definately the problem.
Posted on Jan 25, 2011
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