Question about Goodman Heating & Cooling
You need to check for 24V across the coil.
The thermostat is nothing more than a switch which closes the Y terminal to the R terminal and allowing the 24V to be fed from the transformer to the contactor coil and thus turning the system on.
Easiest was to check this would be to turn off your breakers and jump out the Red and Yellow terminals with either a jumper wire or wire the two tegether. If the contactor engages, you have a wiring problem. If the contactor fails to engage, your problem lies within the outdoor unit.
If you have a multimeter, check for 24V between the Y terminal and the Common terminal at the outdoor unit. If 24V is present, this is also an indication of a problem within the unit itself.
Remember, a lot of Goodman units have pressure switches that open and close according to pressures. You system may not be running for a whole other problem like a loss of refrigerant charge. And this is a good thing. It shuts the unit down to prevent further damage to the system.
Posted on Jul 04, 2010
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Posted on Jan 02, 2017
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