Thursday, 12 November 2020

Replaced board in Trane XE80. Transformer hums when unit is at idle.

Good morning!

My board, a 50A50-473, went bad in my Trane XE80. I replaced it with a 50A55-3797.

Everything works fine, except the transformers hums when the unit is at idle.

Will a transformer run all the time with different boards? What could I have possibly wired incorrectly if not?

Thanks in advance for the help!

-Danny


source https://hvac-talk.com/vbb/showthread.php?2223842-Replaced-board-in-Trane-XE80-Transformer-hums-when-unit-is-at-idle&goto=newpost

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