Posted by Allan In NE on June 16, 2011 at 02:05:56 from (148.66.88.254):
In Reply to: 1066 AC question posted by youngin on June 15, 2011 at 19:51:55:
First off, do you have freon in it? Compressor and all three of the fans will not come on if it is "dry".
Wiring:
Compressor to the low pressure switch (left side of evaporator).
Other side of the low pressure switch to the high pressure switch (left side of the condensor).
Other side of the high pressure switch to the theromostat's #1 terminal.
All power comes in via the two 30-amp circuit breakers inboard of the right battery. One leg powers the condenser fans and the other leg powers up the compressor and the blower fan.
The "problem child" of this entire system is the big cab disconnect plug behind the right step. Make darned sure this plug is making a good connection.
The A/C relay is just sitting there (with power) waiting for it's trigger signal from the thermostat.
Again, the way you describe this problem is that the low pressure switch is blocking circuit function (low on freon).
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