Quote Originally Posted by fly boy View Post
I had my board go bad on a unit that was less than 10 years old.

The fan would kick on when it called for heat. Every once in a while I could get the furnace to fire, but then stop after a day or two, sometimes hours. Finally crapped out for good. Everything was cleaned, no LED's lid up. replaced the board with an Ebay new board and worked perfect. Saved $90 an hour on an HVAC guy, and did it all myself. Took the old board off, and when I unplugged from 1 wire, I plugged into other - so I would lose where they went.

GL!
They do go bad.. Just not as often as people (or technicians) think. Its funny to hear from the factory that most of the "bad" boards they get back for warranty aren't bad at all.

The other day I thought I had a board go bad on a commercial water heater. Called tech support and he said "Yup.... sounds like a bad board to me. Board costs $458" . I hang up with him, and I'm about to tell the customer when I find that the fuse had fallen out of the board and it just needed to be put back in.