Question about Intertherm P3RA-048K Air Conditioner

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Breaker tripping on electric furnace.

I came home this morning and the system was blowing cold air... Thermostat set on 68 degrees... The breaker in the panel was tripped. It was around 16 degrees overnight here. Never had any problems until now. The breaker is very warm, but hasn't tripped as of yet.. been on and running for about 2 hours.( Bad breaker, heating coil, ?????)
Thanks

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  • hickmanjohn6 Dec 23, 2008

    Thank you. Will just get a new breaker and try that first.

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First, how old is that breaker and are the connections all clean and tight?  A warm breaker is normal.  If it hot or buzzing, that is another story.  If the breaker is more than a few years old, it may pay to invest in a new one.  They do wear.  If you have a connection which has come loose or is corroded, it will trip the breaker, arc at a connection point or even cause a coil to fail.  Dirty connections heat up and actually back off the holding bolts to the point of failure or to tripping the breaker with arcing.  With the breaker off, inspect all connections from the panel to the unit.  You may get some surprises.
If none of this turns up a problem, inspect the actual heater coil, you may find dirt in there which is causing a problem or the unit itself is failing and touching a grounding point.

Posted on Dec 22, 2008

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