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Old 06-09-20, 01:21 PM   #1
Lurking Renovator
Join Date: Jul 2013
Location: central MS
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Default Conventional a/c compressor: sump heater question


Hoping this is the right subforum to ask this question.

Background: TraneTTX036C100A1 a/c Compressor tripped its mains circuit breaker yesterday.

Troubleshooting: After a a bit of brute force troubleshooting (disconnected all 3 compressor leads from contactor/capacitors, and disconnected one end of the outdoor fan), The unit still tripped the mains CB. Swapped the feed to my other a/c's same-size CB. Took slightly longer to trip, and I could hear a very short 'grunt' from the compressor (on the other side of the house), before the CB tripped. Walked back to the compressor, and some magic smoke had obviously been let out of something... Only thing left was the 'sump htr' circuit, which always has power available when mains supply is hot.

Temporary fix: Disconnected both leads that feed the sump heater circuit, and reconnected everything else. Compressor now runs fine.

Question: Have any of you a/c gurus ever seen a sump heater circuit fail in a dead short mode?

Extra credit: Any danger in operating the unit as-is, until I can obtain a new heater? I'm in MS (USA) and night time temps this time of year won't drop much lower than the thermostat on-point of 73 degrees.



rvCharlie is offline   Reply With Quote

compressor, out door unit, sump heater

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