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Fan relay or sequencer.

Nordyne electric furnace. Heats up but fan only comes on in fan on mode. T-stat replaced last year. Is this a sequencer or a bad fan relay?

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If it were the sequencer, the heat wouldn't come on at all but the fan would blow. It's the fan relay but it could be the t-stat again. If you get a power surge when the unit is running, it can short out that portion only but typically, it will short out either the heat or the cool side depending on what is running not just the fan.

Posted on Mar 16, 2009

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