Bottom heater and defroster don’t work at the same time

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14200 Closed 2014 Chevy Impala LTZ public

The bottom heater and the defroster won’t work at the same time. I can have either bottom heat or defrost, not both.


I would start by trying to recalibrate the system.


Alternate Method (without Scan Tool)

Note:Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.

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