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Pilot light goes out after a day or two of normal furnace operation
Pilot light goes out after a day or two of normal furnace operation on my Coleman model #7956A856 furnace. I replaced the thermocoupler and it didn't help. I cleaned pilot assembly - it didn't help. I also cleaned the burner orifice due to spider webs in the past (spiders seem to love to make nests in this burner during the off season). Could the problem be a bad gas valve (model 36C67 type 175)? Bad thermostat? Bad transformer? I also checked for excessive air flow from inside furnace pilot light/combustion box area. Air flow from this area doesn't seem to be a big problem, though on very windy/stormy days, there seems to be some air escaping from from pilot access flap door when it's open, but it seems not to affect the pilot light when it is lit - the pilot flame appears unaffected. I'm at a loss...
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