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Forced air heater

Asked Nov 22, 2005, 12:34 PM — 1 Answer
Blows 3 amp fuse. After fuse blows fan comes on. Ignitor works prior to fuse blowing but no gas. One resistor on board appears to have black mark.

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labman Posts: 10,673, Reputation: 3050
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Nov 22, 2005, 03:51 PM
This is not a common, easy problem I can just paste in an old answer for. Which blower, the main one that circulates the air, or a small one for the combustion air? Normally the air handler wouldn't come on until the the furnace warms up. There could be a short in the gas valve wiring, but I would be surprised if it blew a 3 amp fuse. Go ahead and check it. Check anything else that feeds off the fuse that blows.
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