Quote:
Originally Posted by Vegasdan
Does this furnace start? Does the blower work? If the blower starts and the gas ignites and then goes out after a couple seconds it will probably be a bad circuit board. I had that problem a year ago.
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Frequently this problem is just a corroded connector to the circuit board. The fix is to pull the edge connector on and off of the circuit board about 5 times to clean the contacts. You can also pull the connector off and rub the traces on the circuit board with a pencil eraser.
Just had to do that yesterday in fact. I would turn the furnace on. Blower would start. Gas would light for about 2-3 seconds and then go out. Cleaned the edge connector on the circuit board and it started working. Still working fine today.