Question about Honeywell Programmable Thermostat Heater

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Furnace not blowing heat

We have a a TH4210D set to 71 degrees but right now the furnace is blowing cold air.

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  • Anonymous Mar 14, 2014

    It comes on it only blows cold air

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  • 11 Answers

Sounds like a thermal fuse

Posted on Dec 21, 2008

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