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Last year my AC started getting warm. Finally recharged it a few months back. Still didn’t work that day. Next day worked great. Day after that didn’t work. Off and on for 1-2 weeks and now it doesn’t work at all and it’s 111F in Washington. Checked fuses in cab and under hood. I have 12v all the way to at least the AC clutch cycling pressure switch and I swapped that out as it was $20 and I was already testing it. No voltage at the plug that goes into the compressor. To me it sounds like the Power Train Control Module or a bad wire. I guess it could be the diode but I would guess that’s in the ax clutch assembly? Just wanted a second opinion
before buying a pcm.
Last year my AC started getting warm. Finally recharged it a few months back. Still didn’t work that day. Next day worked great. Day after that didn’t work.
Is the low pressure AC line under the hood ice cold when the AC is blowing warm? If so you are likely having an issue with the blend door moving. That would better explain the AC working or not on different days.
If he took the time to read the FAQs, he would already aware of what to focus on...
Remember, the letter "F" in in the term "FAQ" stands for "Frequently"...
In any event, if there's no power going to the clutch, the line won't be cold and the blend door is not a factor.
Neither the PCM nor the clutch diode can cause his symptom. The clutch is controlled by the simple series circuits of switches which all must pass power (under the appropriate conditions).
i would not assume the original poster has included ALL the data.. He said "there is not power at the clutch".... possibly he is right, but that means one of the switches is OPEN when should be CLOSED..... i would think a much more likely possibility is the clutch gap and he is not checking voltage all the time... that could be intermittent.
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