contactor noise, flipping breaker


Old 09-12-05, 05:11 AM
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contactor noise, flipping breaker

About 30 seconds after the thermostat turns on the compressor the contactor begins making qite a racket as it rapidly flips on and off. This lasts about 20 seconds. This has been happening for several months but the cooling was unaffected until recently when the breaker began shutting down the unit during the time it is making this noise. Now the breaker flips about 70 percent of the time when the thermostat activates the compressor. When it is reset the unit generally stays on unil the next activation cycle. I have put in a hard start kit and have replaced the contactor, but the problem continues. I thought that the next step might be to replace the dual capacitor and/or the thermostat. Any advice would be greatly appreciated.
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Old 09-12-05, 05:37 PM
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if you already replaced the contactor, check to make sure 24volts is not dropping in and out on your the whole time that this contactor is acting up..

With this this happing, it's hard on the compressor, and now It may of done some damage and cause the breaker to trip out on you now.
Old 09-12-05, 07:22 PM
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I would double check that contactor, as Jay stated, attach a multimeter and check for constant 24 volts might want to verify your incoming line voltage to this unit also for 240 volts the transformer is probably a 10 to 1 anything below 20 volts from the transformer can let the contactor drop out.
Old 09-14-05, 05:11 PM
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If all is well with the contactor then the bad news is that you compressor might dead but not for sure until some one inspects the unit.

Good Luck
Old 09-15-05, 11:23 AM
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Contactors are cheap (and sometimes cheaply made) this would not be the first time a New contactor acted up, the simplest thing might be to just install a new contactor to rule out that possibility. Make sure you are purchasing the correct contactor!
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