It's about why my heat and a/c don't work

2000 CHEVROLET IMPALA
100,000 MILES
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KLTHOMPSON
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  • 1 POST
I have a 3.8 litre 2000 chevy impala ls. My heat stopped working last fall and I replace the heater core and the thermostat and coils. I also had a rad flush. Still doesn't work and now my a/c doesn't work. Do you think I need to replace my rad? thanks
Jun 23, 2012 at 11:22 AM
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WRENCHTECH
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  • 20,761 POSTS
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
Jun 23, 2012 at 12:23 PM