I have a Tappan furnace. I just replaced the circuit board and it was working for a little while. But now it seems I am getting no power at all to the unit-no lights on circuit board. I replaced the fuse on the circuit board but still no power. I checked breakers and power switch and made sure panels are in place. Still no power. Is there another fuse other than the circuit board that may have blown? Where do I locate it?
Thanks

If you checked the fuse at the board, and the fuse at the urnace switch. It must have blown a transformer.