Wouldn’t hurt to take a look at the resistor. Should be on the right side of the AC suitcase near the POA valve. . Two screws hold it in.
If a heater car, it’s located on top of the heater housing inside the car.
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Ed
1968 GTO (Thanks Mom)
2006 Silverado
2007 Cadillac SRX
2015 Chevy Express 
2024 Cadillac LYRIQ
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