Question about 1999 Ford F150 Regular Cab

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99 Ford Superduty Air Conditioner quits working after 10-15 min.

Air Conditoner Works great when you first turn it on. It seems to work longer when you have it on low. When it is on high it shuts down faster. After 10-15 minutes it just stops working and starts blowing warm air. If it is shut off for awhile it sometimes starts working again. Any ideas? Why would it work fine then just shut off? Thanks for any ideas.

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I have an f250 diesel. Same thing, shuts off after about 10 minutes and comes on when it feels like it. Its not the cycling switch. I checked the voltage at the compressor clutch and its 12v. I also, made a "new" ground for the compressor. The black wire at the compressor is ground. This didn't do anything, nor did checking the freon. It will also shut off if you have run it for a while, turn the HVAC selector to off and back on. Although it has power at the clutch (compressor) it didn't come back on.. this is weird.. i think. I was sitting there trying to figure it out and used my test like to "nudge" the clutch on the compressor.. gave it a little "push start" and it came on again.. seems it needs a new compressor? I will see what happens this weekend when i try that. Also, the pressure and contamination switches, are open circuits, that closed and predetermined settings, they are not tied into the ground of the compressor, but "looped" thru the circuit.

Posted on May 21, 2010

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I have the same problem with my 2002 F-250. I checked the r134a and it was within the limits. I raised it to the upper part of the safe level. I notice that after the 10-15 minutes that my compressor starts to go off and on. It starts and stops immediately. Could this be a pressure switch? does your compressor run constantly? or does it shut off like mine? I am interested to find this out too!

Posted on Aug 22, 2009

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I think there has been some leakage of the refrigerant gas, freon or cf4, which is why it works fine on low cooling but the moment you demand more cooling the loss of refrigerant ends up making the compressor work overtime till it automatically trips on reaching high temp. It would be advisable to check the quantity of refrigerant gas and top it up............sodeep

Posted on Jul 27, 2009

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