Posted by Allan In NE on July 06, 2011 at 04:35:30 from (148.66.88.254):
In Reply to: 1066 AC? Allan in NE posted by youngin on July 05, 2011 at 19:46:32:
With the tractor OFF and the key on (no pressures involved), take a jumper wire and jump across that high pressure switch to see if the compressor clutch now snaps in (you should hear it "click".
That switch is a normally closed switch and will open if the hi-side pressure gets too high.
Power flow is from the thermostat to the hi-pressure switch, thru it to the low-pressure switch and then out to the compressor clutch.
Sure sounds like a bad hi-pressure switch, but let's check to make sure.
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