pitteach
New Member
I have a 5 yr old Heil forced air 75k btu, 92% furnace that is blowing the 5 amp fuse on the control board. There is a low humming sound coming from the board and the transformer is warm, but when I install a new fuse and throw on the power, it pops immediately. This happens wether or not the t-stat is calling for heat or not. The led trouble code is not showing (obviously). The furnace has worked fine and nothing has been done to it-it just popped all of a sudden. I am suspecting the transformer, but how can I check or are there any other ideas?
Thanks
Thanks