Furnace has a mind of its own

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Old 10-21-13, 11:38 AM
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Furnace has a mind of its own

My oil burner comes on with the t stat in the off position. Just the burner not the fan. When the stat is on it runs fine. Furnace should not run at all with the stat off. Oh forced air furnace. Any ideas?
Nordo0
 
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Old 10-21-13, 11:51 PM
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Welcome to the forums.

Normally on an oil fired furnace.... the burner starts first and the blower comes on later as the furnace heats up.

Sounds like a defective thermostat.
To verify.... disconnect one of the wires to it and see if burner stops running.
 
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