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Furnace fan running off and on blowing cold air

Intertherm m# g50ra

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  • hmoob_lo Apr 02, 2009

    wheater my fan is on or auto. cool and heat is off. and the fan is still on blowing cold air all day long. can n e one help me out?

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1 Answer

Need a little more info. Does the fan never stop? Is this a gas furnace? Is your thermostat in the fan auto not fan on position?

Posted on Dec 09, 2007

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Posted on Jan 02, 2017

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Shastalaker7

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I have air coming from the vents but no heat. The furnace is 23 years old and I've never replaced anything in the unit. Best guess? GE Intertherm. thanks


If the thermostat is set on Fan and not Auto the fan will continue to run. If the fan control is bad or is set at too low of a setting, it will blow cold air after the furnace has shut off. From what I guess of your explanation, your furnace is not producing any heat and the room air blower runs blowing cold air. You may have two issues happening. Make sure your thermostat is calling for heat by setting it to a high setting. Inspect the thermostat to see if it is set at Auto. Go to the heating system and inspect it to see if it is heating. If you can't view any flames carefully touch the exhaust pipe and see if it is hot. If not, you have a no-heat condition. A 23 year old furnace may need some TLC so call a technician you trust. He/she may need to replace the ignitor or thermocouple to get it going. They will also check out why your fan is running when it should not.

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Hello , I think I can help , It sounds like the gas valve as long as your sure there is plenty of gas going to the unit and you have an electronic ignitor , if there is a pilot light its not electronic. the gas valve should come as an assembly to install and its pretty easy to complete. Let me know if you need more help. Good luck

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