300 E Air Conditioning

[jmorrisonsd]

I have 1990 300E Gas 6. A few months ago for no apparent reason the heater came on and wouldn't turn off. This happened for about a day and then just fixed it self. However now that it is summer, I notice that my AC isn't working. When I switch on the controls in the cab, the compressor isn't turning. Not sure how to troubleshoot this problem.

I think is might be something other than the compressor in light I had the heater problem. Sounds like maybe a climate control switch, or something along that line to me?

Any help would be greatly appreciated!