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Carrier a/c tripping circuit breaker

This is a fc4bnb054 carrier heat pump. It occasionally trips the breaker on the unit. I have used a meter and checked electrical connections and voltages and the only thing that I found was that I could not get a reading from the output side of the transformer. Could this be the problem or do I need to look somewhere else?

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  • bennettstuff Feb 04, 2009

    I am sorry.. It is the breaker on the unit itself that feeds the transformer, heat strips, fan etc.. I pulled the heat strips out and they visually look ok with no breaks or burned spots on them.. thanks fotr the assistance.

  • bennettstuff Feb 04, 2009

    This is an older home and has been working in the past... It is a heat pump and the heat strips are not even in use when this is happening..Could a bad transformer be causing the problem as it is hooked up to the breaker? thanks again for the assistance.. ric

  • Chris Parrish May 11, 2010

    Which breaker you should have one at the unit on the heat strips and one in the panel for the house?

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I believe you are tripping the breaker because you are too close to the capacity of the breaker based upon the distance from the panel to the heat pump. If you are electrically skilled you could check this by measuring the distance and then looking at the standard to see. If this makes little sense to you, you may need to have an electrician check for u. Either way, good luck with it.

Posted on Feb 04, 2009

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With this cold weather, -- it is not likely tripping off because it is too hot!

Are you familiar with the history of this unit?-- Like has it tripped in the past during HOT weather?
This might be a clue, that the circuit is really loaded close to its limit--

This leads to the next possibility: That the breaker is getting weak (They do after many hard starting loads!
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Another thing to look for, is loose lug screws at the main fuses, and the Main contactors, and the motor leads--- for loose wires result in overheating, which raises the current, and leads to tripping, too.

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