[brcidd]

I cut my teeth on those cars, for the life of me, I'm not aware as to what you guys are referring to as the module, especially since it is not a climate controlled car....

Those cars will set a low refrigerant code, and can be reset by unhooking battery for 10 seconds. The most common a/c failure mode is loss of refrigerant due to a leak..most common leak location is the compressor shaft seal and the compressor belly o-rings.....

So when it is inop, is it low on refrigerant? my guess is that it is. You can test for this by reseting the code, then run the system- if it rapid cycles and doesn't cool, then it is low on refrigerant, and will soon set the code again.

Your mechanic may just be resetting the code and saying it is a module---ask him for a part number, or a location of it-- point to it,, or give you one of the old ones.....

The code is set by the ECM, not any module...so is he replacing the ECM? That would be the main computer for the car.....