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  • Writer's picturesteve springs

What does a bad contactor look like?

This contactor blew apart because it was not changed during routine maintenance. The slot on the right arched out because the contact points get pitted [ gives contacts craters like the surface of the moon ] and when your thermostat turns it on one to many times, the plasma torch that is created either welds the points together or like in this case, blows them apart.


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