Contactor clicking rapidly while running


Old 06-07-19, 07:35 AM
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Angry Contactor clicking rapidly while running

I searched the forms only came across post where the AC would not turn on, so maybe I am asking the wrong question but decided to ask for help.

Two days ago I reached out to a friend in HVAC when I started hearing a clicking sound, he ended up replacing the contactor and problem solved until this morning when I started hearing the clicking sound again. Today, the clicking has become more rapid/violent, so I am reaching out for help to see if there is anything I can do before asking or calling for help.

goodman ckl42-1a (installed 2001) no leaks, no major repairs. clear of debris.
New contactor - voltage held steady on the old contactor, even while the switch was clicking but I don't recall the voltage. 24 I think.
Ecobee 3 thermostat - installed by the power company 2+ years ago

thanks in advance for any help.
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Old 06-07-19, 10:31 PM
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Welcome to the forums.

As a guess....... you are low on refrigerant and the contactor is opening on low pressure. As soon as the compressor stops..... the pressure rises and the contactor closes again. This can go on and on.
(don't allow it to run like that..... it can very damaging)

If you're slightly low it happens when it's cooler outside. Once it gets hot it happens less.
You'll need to have the charge checked.
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