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A/C control unit repair 900 1992

posted by someone claiming to be Frank , jambrf@aol on Sun Dec 30 14:35 CST 2001 [RELATED]

Greetings,
After installing new compressor , couldnt get to engage, discovered not enough current going to clutch , (jumped directly w. 12 v source and worked fine)dismantled control unit (just replaced 2 years ago with rebuild)resoldered everything i could and still same problem not enough juice to engage clutch. Does anyone know who can repair the board ?? Also i assume this controller also turns on electric fan , mine wasnt turning on is there a fail-safe circuit if fan fails then compressor wont engage? Any help appreciated,
Thanks,
Frank , sth fl

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A/C control unit repair 900 1992

posted by Jerry Warren on Mon Dec 31 10:28 CST 2001
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last visit: Tue Sep 2 17:06 CST 2008

[RELATED]

The fan gets powered directly from the battery. The ground goes through the power unit.ECC (elctronic climate control). The compressor also gets its power to the solenoid through the ECC. Check the low pressure switch and see if there is 12 volts there. It appears from the wiring diagram that the fan will operate even though the ground goes thru the power unit. I can't help on the board issue.

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