AC is F-ing up. Help Please - Ford Powerstroke Diesel Forum

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post #1 of 22 Old 06-14-2009, 03:45 PM Thread Starter
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AC is F-ing up. Help Please

99 F250 Super Duty 7.3

Recently charged my AC and it works fine UNTIL- I get going down the highway (60 mph) then it starts blowing warm air. When I turned off the highway the compressor kicked on again and worked for a little bit, then quit again. When I parked it here at home I opened the hood to see the compressor was not working at all. Later, I went out to see if would work. Turned on the AC, and it took a few seconds for the compressor to kick on, then it stayed on like it should, then after it had been running for a while it kicked off for a few seconds every so often, which I think is normal, right? So what can it be? Relay? Compressor? Clutch? Help please!
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post #2 of 22 Old 06-14-2009, 03:48 PM
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i need to know also cause i dont get ac as well for almost the same reasons

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post #3 of 22 Old 06-14-2009, 03:48 PM
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Sounds like either a bad clutch or switch. Anyway, here's a

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
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post #4 of 22 Old 06-14-2009, 03:52 PM
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could also be the switch, had mine go bad and it would work intermittently
post #5 of 22 Old 06-14-2009, 03:52 PM
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wheres the switch?

2006 Ford F250 CCSB FX4 6.0

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post #6 of 22 Old 06-14-2009, 03:58 PM
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Quote:
Originally Posted by bockhold View Post
wheres the switch?
It's on the compressor.

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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post #7 of 22 Old 06-14-2009, 04:01 PM
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Quote:
Originally Posted by RadarRider View Post
It's on the compressor.
post #8 of 22 Old 06-14-2009, 04:02 PM
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is that the 2 wire plug?

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post #9 of 22 Old 06-14-2009, 04:07 PM
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You didnt over-charge it did ya?They dont like it when there over about 46 on the low side,,with the rpms up around 1700.


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post #10 of 22 Old 06-14-2009, 04:08 PM Thread Starter
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is the compressor supposed to kick off occasionally? As to keep the evaporator core from freezing up completely?
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