Ford A/C :: When Air Is Turned On Compressor Cycles On And Off


Jul 8, 2009

I just picked up a 97 F350 with a 460. When the air is turned on, the compressor cycles on and off. It only stays on for two, maybe three seconds, then is off for about fifteen seconds. I have one of those of those hokey gauges on the refill can, and it says the pressure jumps when the compressor comes on. Could it be going out on a hi head pressure kinda thing? Could the orifice be clogged? I'll have the freon pulled out, then can get into it....

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Is there a belt that drives the compressor (other than the serpentine)? And, is this something that I should get fixed ASAP or can it wait until my next oil change? Meaning, if I wait until the oil change (under 1,800 miles) will hurt anything?

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Couple weeks went by and it seemed okay, though maybe not quite as cold as when I picked it up. Sometimes I'd drive and it would be very cold so I'd think it was fine, but a few minutes or some time later I'd know for sure it wasn't right. The weather vacillated between hot and cold too, which made it harder to tell. Finally the past 2 weeks it got really hot and I knew for certain it wasn't putting out cold enough air. Yesterday was in the low 90's and I was sick from the heat while driving. Only felt like a fan blowing. I left it at the mechanic's today. They just called and said the vent temp is normal and there are no leaks. They're going to check for an electrical problem, as I also have a brake light that blows on a regular basis. (Though he said those aren't on the same circuit)

As far as my operating behavior, I don't turn it on and off all the time, and once it's going for a few minutes I put in on recirculate. I'm the only driver.

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