Question about 2003 Chevrolet Impala
You probably have automatic air conditioning with dual zone capability, Please review the owners manual for the dual zone operation. I looked in the service manual and certain heat / air settings criteria have to be met before the system will work properly in automatic mode. If those conditions are not met, the system will assume manual operation and mostly play dead waiting for the user defined manual settings. Start with a good review of the dual zone automatic settings.
Posted on Nov 04, 2012
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Posted on Jan 02, 2017
SOURCE: ac blowing hot air
the blend door actuator located on the air box (right hand side under dash) is prob. inop. worst case senerio the blend door its self is broken. I have replaced the actuator more than anything.
Posted on Sep 16, 2009
there is an actuator for the drivers side heater that opens the temp door. this motor actuator needs changing. so it is stuck in heat mode and now motor will not move door to cold.
Posted on Sep 01, 2009
Do you have separate drivers side and passenger heat controls?
If you do have this system,the common problem is the control unit s on the heater/a/c assembly. Can you adjust heat and cooling on one side?
Then the other side control unit is most likely bad.
Posted on Oct 20, 2009
Do you have dual zone heat and cooling controls?
If so......the drivers side air flow control unit on the heater assembly is not working.
It is mounted on the heater assembly and can usually be accessed through the glove compartment to change it.
The stepper motor on these units fails often.
This should be the problem on your car 99%...if you have a separate heat/cooling control for driver and passenger areas.
Posted on Oct 29, 2009
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