2013 Silverado 2500hd Duramax heat issue

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#15912 Closed 2013 Chevrolet 2500hd public

I have no control of the heat, doesn’t matter where I put temp or location always hot and always blowing out the vent. Replaced heater control module and still no change.


I would start by checking the HVAC Ignition and HVAC Battery fuses in the underhood fuse box. Make sure the fuses are both present and good.

Then try the following recalibration procedure.

Begin with the ignition switch in the OFF position.
Remove the HVAC/ECAS fuse for a minimum of 10 seconds.
Install the HVAC/ECAS fuse.
Start the engine.
Wait at least 40 seconds for the HVAC control module to self-calibrate.
Turn the ignition off for at least 10 seconds but no more than 30 seconds.
Restart the engine and check the HVAC operation.

If your truck does not have the HVAC/ECAS fuse use the HVAC Battery fuse for the procedure.

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