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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 08-19-2014, 12:22 AM
cjdmcgarry cjdmcgarry is offline
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a/c compressor won't kick on

I've been troubleshooting the a/c on my 1991 F250 XLT Lariat 4x2 for a few days now. The blower is working, but is not pushing any air through the vents most likely due to a clogged evaporator (its covered in dirt and may be a little damaged so its not allowing air to pass through). Additionally the compressor clutch is not engaging. I read the wires going to the compressor and am not getting any voltage. I tried jumping the accumulator to see if it was a low charge keeping the compressor from coming on and had no luck with the power issue. This leads me to believe that the a/c switch on the console isn't engaging to send power to the system. Any ideas?
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Old 08-19-2014, 11:12 AM
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You already ruled out the accumulator, so yes, focus on the console and the compressor wiring itself. Replace the evaporator too.

Dumb question: Did you check any related fuses?.
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