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Kenton Guidry
Kenton Guidry, HVAC Technician
Category: HVAC
Satisfied Customers: 966
Experience:  12 years install/service experience.
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Hi - my furnace fan keeps starting and stopping on its own

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Hi - my furnace fan keeps starting and stopping on its own - even if I have the thermostat in the off position. I disconnected the thermostat to see if it was causing the problem but the fan came on anyway. Will I need a tech to come out on this one?
Either your fan control wiring is shorted to the power side of the control wiring or you have a relay problem.

I would recommend getting a technician out because wiring problems can really give some trouble even to trained techs.

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