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Where do I begin looking for an L1/neutral polarity fault.(green red flash)
padropete
Mar 3, 2014, 03:28 PM
Gibson/nordyne *sc upflow 92.1% gas furnace.im getting a red green flash.
Grady White
Mar 3, 2014, 05:21 PM
You can try reversing the incoming black & white wires where they connect to the board.