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I need some help. I have two gas forced air furnaces in the unfinished basement of my turn of the century home. recently the pilot light on one of the units has gone out three times in the last 2 months. Could it be a fuff back or something similar. There is no dedicated air venting from the outside but plenty of air infultration from windows etc. Any idea what would be causing this all of a sudden?
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Make sure the thermocouple is mounted correctly so it gets full flame from the pilot. Also make sure the nut that holds the thermocouple line into the gas valve is snug and the thermocouple tubing is not kinked anywhere. If that's OK, then try replacing the thermocouple - it could be getting old and tired.
*One additional note. Take care when working with gas appliances and gas lines. It's not something to fool around with if you don't know what you're doing. I agree with allaround on the steps for troubleshooting. If you aren't sure what you are doing, get a gas certified service man to check it out.
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Check out your Heat exchanger. My stainless steel exchanger corroded because the nozzle had been cut back and the exhaust gases where not burning hot enough to prevent condensation in the secondary exchange chamber. As the Exchanger corrodes little pinholes allow air from the furnace blower to blow out your pilot. The furnace will relight your pilot 3x before needing to be reset. A note of caution this happened to my furnace just before the 10 yr warrenty ran out, otherwise I would have had to pay over $600.00 for a new exchanger!
*If you have holes is your heat exchanger you will have far bigger problems that blowing the pilot light out. Those holes could allow carbon monoxide to get into the house and potentially kill you. If you have gas in the house you should have a CO detector mounted somewhere near the bedrooms.
*If you have holes is your heat exchanger you will have far bigger problems that blowing the pilot light out. Those holes could allow carbon monoxide to get into the house and potentially kill you. If you have gas in the house you should have a CO detector mounted somewhere near the bedrooms.
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I need some help. I have two gas forced air furnaces in the unfinished basement of my turn of the century home. recently the pilot light on one of the units has gone out three times in the last 2 months. Could it be a fuff back or something similar. There is no dedicated air venting from the outside but plenty of air infultration from windows etc. Any idea what would be causing this all of a sudden?