Changed sensor 3 times changed the board 3 times Unit will not test or go in defrost AC works and heat pump works just will not go into defrost I have checked every thing what is wrong
Feb 17, 2014 Rating
VOLTAGE TO BOARD by: Anonymous
MAKE SURE YOU HAVE AT LEAST 22 VOLTS (TO THE BOARD). RECENTLY HAD LOOSE WIRE NUT AND ONLY 14 VOLTS TO THE BOARD.