The AC/heater circuit will blow a fuse after about one to thirty minutes (random) just with the fan blowing. I have tried to narrow it down, unsuccessfully. The fuse blows whether I am using the AC, the heater, the defrost or just the fan. I have replaced the blower motor three times. I have replaced the HVAC blower switch. I have removed the blower motor resistor, but it tests fine. I have even removed most of the dash to examine the wiring and unwrapped the bundle leading to the resistor. Nothing burned and nothing out of the ordinary. On a mechanic's recommendation, I tried detaching the wire harness going to the AC compressor, but it will still blow a fuse. I have gone through three or so packages of fuses by now. I am at a complete loss and about to give up.
Interestingly, these problems started shortly after I had a mechanic fix my AC. (It would not cool. If I remember correctly, the compressor was replaced.)
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Monday, October 9th, 2017 AT 10:10 PM