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Power Strokes
6.4 Aftermarket
A/C expert needed.
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[QUOTE="CATDiezel, post: 1013359, member: 4387"] A real set of gauges for starters. But also. Check the AC clutch relay. If all else fails. Build a jumper and manually engage the compressor. Since you will be doing it manually watch the gauges if things get wild like below 5 psi on the low side or closing in on 400 psi on the high side kick it out. That will tell you if the business end of the system is working. If it is. Then back track from there. Could be in the cab via the temp control module if it's auto climate. I'm going to guess relay. There are alot of things to check. But if it's over your head then you'll have to bite the bullet and take it to an AC shop. Not just a regular garage. Most regular garages don't take the time to properly fine tune and balance an AC system. [/QUOTE]
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