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Car Forum / Driving, Maintenance, Tuning / 4x4 Cars / July 20061994 GM K-1500 Air Cond blinking
1994 GMC K-1500 "AC" is blinking on the climate control display. Compressor will not cycle to take in freon. I jumped the low pressure side.. no clutch cycle. I jumped the high pressure side... no clutch cycle. I jumped both sides.. no clutch cycle. >1994 GMC K-1500 > [quoted text clipped - 4 lines] >I jumped the high pressure side... no clutch cycle. >I jumped both sides.. no clutch cycle. What happens if you hot wire 12 volts to clutch? (checking to see it is it bad) ----------------- The SnoMan www.thesnoman.com Kevin from another board answered it for me! Evidently, a fault is detected if the clutch does not cycle within so many times in so much time period. When this happens, the AC faults. He told me to disconnect the battery to resolve the fault. So I disconnected the batery, jumped the low pressure switch, then reconnected the battery. Started the truck, and the AC compressor was working!!! I immediately put in the freon charge, and removed the jumper & reconnected the switch. Now enjoying cold air. > >1994 GMC K-1500 > > [quoted text clipped - 10 lines] > The SnoMan > www.thesnoman.com >Kevin from another board answered it for me! Evidently, a fault is >detected if the clutch does not cycle within so many times in so much [quoted text clipped - 4 lines] >put in the freon charge, and removed the jumper & reconnected the >switch. Now enjoying cold air. Good deal, I had forgotten about that. Glad you are chilling. ----------------- The SnoMan www.thesnoman.com >>1994 GMC K-1500 >> [quoted text clipped - 10 lines] >The SnoMan >www.thesnoman.com Does it flash for about two minutes then stop? (and repeat this each startup?) If so check the low freon switch and wires, connector at the rear fo the A/C control head, and the unit. You may have multiple problems, low freon being just one. |
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