97 F150 AC Compressor will not kick on. - F150online Forums



97 F150 AC Compressor will not kick on.

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  #1  
Old 10-03-2007, 07:51 PM
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97 F150 AC Compressor will not kick on.

I checked the fuses and freon level. I can not get to compressor to kick on. Blowing hot air. Help.

Forgot to add this. It is the 4.6L

Last edited by r0berth1; 10-03-2007 at 07:58 PM.
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  #2  
Old 10-04-2007, 07:59 AM
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How did you check the "freon level" and what was the static pressure reading?

Steve
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  #3  
Old 10-04-2007, 12:19 PM
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assuming that you are correct the Freon level is OK (By bypass the Clutch Cycling switch on the Accumulator)
Then you can have a Bad Compressor relay, a bad Hi-pressure switch, a Bad compressor clutch coil or an open (broken wire or bad terminal) circuit.
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Old 10-05-2007, 10:02 AM
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His truck doesn't use a relay on the clutch. The clutch coil is switched directly by the cycling switch or disabled by the high pressure cutoff switch.

Steve
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  #5  
Old 10-05-2007, 10:21 AM
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I have the r134a pro gauges. I don't remember what the reading was. I will get it this afternoon. I checked the cable, terminal looks good, no burnt spots or arch spots, also wires are not broken.

Last edited by r0berth1; 10-05-2007 at 10:23 AM.
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  #6  
Old 10-07-2007, 04:24 PM
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it is reading 106PSIG on both the Low and Hi side. I have replaced the clutch already and that was not it.
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  #7  
Old 10-08-2007, 08:00 AM
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Quote:
Originally Posted by r0berth1
it is reading 106PSIG on both the Low and Hi side. I have replaced the clutch already and that was not it.
Your system is well charged.

You probably have an electrical problem. Disconnect the clutch cycling switch and install a jumper into the harness connector. If the clutch now engages, replace the switch. Otherwise, let us know and we'll wlak you though the circuit check.

Steve
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  #8  
Old 10-16-2007, 07:39 PM
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Got it working, thanks

It was the clutch cycling switch that was bad. Thanks again for your help.
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  #9  
Old 10-31-2007, 03:50 AM
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Quote:
Originally Posted by projectSHO89
Your system is well charged.

You probably have an electrical problem. Disconnect the clutch cycling switch and install a jumper into the harness connector. If the clutch now engages, replace the switch. Otherwise, let us know and we'll wlak you though the circuit check.

Steve
where is the "clutch cycling switch" located? I seem to have the same problem.
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  #10  
Old 10-31-2007, 04:40 AM
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Quote:
Originally Posted by supraisthebest
where is the "clutch cycling switch" located? I seem to have the same problem.
Yeah, where can I find that.
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  #11  
Old 10-31-2007, 09:28 AM
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It screws into the top of the aluminum accumulator can mounted on the firewall, just below and towards the truck center from the plastic cover over the mega-fuses and the starter relay.

You will probably have to remove that cover and move some harnesses around to get to it.

Steve
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  #12  
Old 11-01-2007, 09:46 PM
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My truck had the same issue. The clutch had worn and the air gap was too big for the electomagnetic clutch to overcome. I lapped the shim down about .030", and it's been fine for about 2 years. You will find some info on this in this forum.
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