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Re: goodman cetral air system brand new contactor hums...
That's what contactors are supposed to do, but they are supposed to turn the air conditioner on because the thermostat activates them, not your finger. Be very careful about sticking your finger in there.
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1 posible cause.the thermostat supplies 24 volts to the outside unit to control the contactor if you hear a ligth huming on the outside unit this is the being activated. if this is the case then
check to see if any ants are in or around the unit see video, they will usually climb to dry areas before during or after a storm and for some reason they like the contactor if this is the case cut all power to the unit and clean contactor spray the area around the unit with an insecticide ( not the contactor) replace cover and test unit. Best of Luck.
Sounds like you have a bad capacitor for your squirrel cage fan , now as for the a/c unit sounds like you have a direct short in compressor to ground or leg to leg , check all wiring to make sure that it is not grounding out or melted together.
You have stuck contactor or a bad Tstat. Call a service tech and get a free estimate on repair. To check to see if it a bad contactor turn ac tsat to off position and see if it still runs. Open up service panel and check contactor. if possible most Goodmans have a covered contactor unless you take the cover off you can not tell Rus
Control wires come from the thermostat to power the contactor coil. At the thermostat the red wire must power (switch) the yellow wire to make the contactor pull in to run the outside unit, Check power with a ac volt meter between the red wire and the yellow wire, with the heat/cool switch turned to off. If you do not have 24 volts ac, your wire may have an open from the thermostat to the outside unit, your transformer may be bad and not supplying power, or your contactor coil may be open
Defective thermostat wire.
With the t-stat set for cool and turned down on a low temperature, check for 24 volts at the contactor low voltage hookup. If you have 24 volts, replace the contactor.
You can manually close the contactor to make sure the high voltage is going through it.
3 amp is standard.the fuse is blowing to protect the transformer.It is telling you that there is a short in the low voltage wiring.Goodman also had an issue with the coil shorting on the contactor.To prevent damage.....i'd call a pro.It should be a fairly simple repair.