The A/C stays in heat mode even when switched to cool. What might be wrong?

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#15179 Closed 2015 GM Sierra Denali public

The A/C stays in heat mode even when switched to cool. What might be wrong?

Sparky

If the battery was recently disconnected or went dead the automatic recalibration process may have been interrupted and the system is stuck. If there was no battery issue chances are there is a failed actuator.  Do you have dual zone temperature control or single zone? If dual, is the temperature control issue present on both sides of the dash?

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