do ac compresser suppose to be on with regurlar heat settings on 2005 impal
The A/C compressor will come on in the defrost setting anytime the outside temperature is above 35°F. That's normal. If you don't want the compressor running in the other settings press the button on the control panel with the picture of the snowflake on it. There should be a little light on the button that comes on when the A/C is on. Perhaps yours is burned out. Personally I keep the A/C on year round. It prevents the windows from fogging up and keeps the seals in the A/C system lubricated. HTH. - Jim
I agree. It's normal for it to come on when defrost is on.
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