Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry your having this problem
is this a duel heater AC controller in this truck ?
and both sides get hot ?
when this happens and they are hot if you open the hood with the truck still ON is the AC compressor engaged ?
are there any PCM or BCM codes set ?
your saying the ECT ( engine coolant temp ) is reading -40 degrees all the time ?
which temp is that saying -40 the ambient outside temp ? the driver or passenger inside temp ?
I am just trying to see if our issue is the compressor being turned off or the temp actuators are doing this
was the new control head programmed to the trucks VIN number ?
first have the control head programmed
if it still does this see if you can control the drivers temp actuator to full hot and cold and see if it will get cold on the drivers side
or see if you can remove the actuator and physically move the door by hand and get cold air
ok then see what it does
when this happens can you command on the ac compressor with the scan tool and will it get cold if you do that ?
ok if commanding it on still will not work remove the drivers temp actuator and see if you can turn the door by hand and get cold
we need to see if it is one or both of the temp actuators causing it to not be cold or the compressor is being shut off for some reason
also make sure the refrigerant is full in the AC system just to be sure
see if you can turn the drivers side temp door by hand to get cold