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View Full Version : Why does my transformer keep blowing on my Furnace when I turn the A/C on


Wizdumber12
May 19, 2013, 04:52 PM
I replace my nordyne control board on my furnace because it was bad. It was replace with a universal honeywell board. Now the heats works fine but when I tried the A/C the transformer and the fuse blew. Replaced both and now just the transformer blows not the fuse