Question about Heating & Cooling
Green flash is the sparking, which is common which elderly contactors. It should likely be replaced. Test for the problem by checking for continuity (ohms) on the solenoid coil of the contactor. (The two small wires on the side.) Test also if you get 24v AC on those two wires when the A/C is turned on. If you have no 24v, it's a thermostat or wire problem. If no continuity, replace the contactor. (Always pull the wires off the contacts when checking the contacts for continuity.)
Posted on Nov 11, 2010
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Posted on Jan 02, 2017
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