Chrysler Repair: 91 Spirit AC (including blower) then recovers, radiator fan, dodge spirit

Question
I have a 91 Dodge Spirit, 2.5 automatic, with all original AC. It has not been converted to R134 or altered in any way, and it seems to work great. This summer has been especially   hot and humid, and on really bad days, the AC has shut down completely. Meaning, the blower motor shuts off, won't even run when the heater is selected. AC compressor doesn't cycle, engine cooling fan stops if not needed for the engine. Just dead.

I turn the AC off for 30 minutes or so, and then it all starts working again. Is there some sort of thermal overload or something on these cars? What would cause this?

Answer
Hi Lawson,
I believe that the fuse that provides power to the AC/heater control and the blower has a small crack in its internal wire that opens the fuse when it heats up and then spontaneously closes when it cools. That fuse is #9 in the block under the dash. That doesn't explain the radiator fan when needed by the engine conking out at the same time, but it could be that the temp of the coolant hasn't reached the level that calls for the radiator fan. When you think that the radiator fan has conked out, try pulling the plug on the temperature sensor located on the thermostat housing box with the engine running to see if that starts the fan or not. It should. The radiator fan is on a different supply circuit, except that the AC should bring it into action when that is activated by controller signal. So I am not surprised that if the AC panel/blower goes out so too would the fan. But I am not sure why it won't power up if the engine really needs it. It would require a common mode failure for that. There is a thermal sensor on the evaporation coil of the AC which shuts down the AC compressor when it freezes up, but that should not kill the blower motor when you ask for it in the "heat" setting.
Roland