Purchased a 4c upgrade kit from 4th gen mods for my 2014 express with the 5in radio. After getting everything installed everything works except the ac will not run.
I have checked all blend doors for proper operation and they move to the end of their limits from hot to cold, floor to defrost, and recirc.
My kit came with with the 2018 hvac module 6836 6552 AA and the truck already had the 7 speed fan.
When plugging in the old hvac controls everything works as it should.
Any ideas as to why the ac compressor won't start on ac, max ac, or defrost?