97 F150 4.6 AC stops intermittently - Ford Truck Enthusiasts Forums



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97 F150 4.6 AC stops intermittently

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Old 04-04-2007, 10:47 AM
baileybones baileybones is offline
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97 F150 4.6 AC stops intermittently

My ac has started shutting off intermittently. I feel it surge at highway speeds and the output air starts getting warmer. I can turn the ac OFF, wait a few minutes, cut it ON and cold air returns. The clutch is not engaged when it quits. Also, using an off the shelf guage the freon pressure is at "alert".
Do I have a pressure switch problem? Is the switch replaceable without losing freon and needing recharged? Any help is appreciated.
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Old 04-04-2007, 11:04 AM
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TheWiz427 TheWiz427 is offline
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You'd get more answers in the 1997 - 2003 F150 forum Baileybones however it sounds like it might be low on freon. Also if memory serves me correctly you have to depressurize the system to replace the pressure switch.
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Old 04-04-2007, 11:07 AM
baileybones baileybones is offline
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Thanks Wiz...I'll check it out.
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Old 04-04-2007, 11:19 AM
92F150Flare 92F150Flare is offline
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I had an ElCamino doing that and it was the engine fan clutch.......slipping and causing the hightemp/pressure switch to cut in and out.
Wiz is right....low freon will do it too
Good Luck
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Old 04-04-2007, 12:52 PM
baileybones baileybones is offline
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Thanks, I appreciate the reply.
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2004, 46, ac, air, cond, conditioner, conditioning, ebgine, f150, intermittently, quits, starts, stops, truck

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