1992 Dodge Dynasty Repair Question
Heater/ac quit working
"The air quit a few years ago."
Does that mean the air conditioning or the air flow from the fan? Since you replaced the fan motor, I'm assuming you mean there's no air flow. The place to start is by measuring the voltage at the motor's electrical connector. There should be 12 volts on the dark green wire. If it is missing, look for fuse 10, a 30 amp.
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