Gas Furnace Blower Motor Wont Turn Off

A furnace blower that won t turn off will run up your energy bills and shorten the life of your furnace equipment both expensive problems.

Gas furnace blower motor wont turn off.

Bad control relay or board furnace blower fan won t turn off this problem will depend on what type of gas furnace you have. On the whole the temperature control switches cannot be adjusted and are to be changed if they are defective. If your furnace won t turn off even after your house is at or above your programmed temperature then the problem is usually more complex. First confirm that the room thermostat is not calling for heating or cooling.

Your thermostat fan setting is set to on. If you see or hear the fan turn on your blower motor is not the culprit. If the furnace blower does not turn off turns off too quickly or not quickly enough as it blows cold air towards the end of the heating cycle then the glitch is possibly a bad temperature control switch. After much troubleshooting i found the heat strip element was broken and shorted to ground this was allowing the heater to still work fine and the shorted current found its way to the.

Common causes of this problem. A thermostat that s set incorrectly a fan limit switch that s in its continuous on mode. More modern gas furnaces will have a control board. So if your furnace blower won t turn off and you want to fix it check first for.

Older furnaces will use either a sequencer relay or a simple peanut relay. If the fan does not start you have a wiring issue circuit breaker trips or motor problem circuit breaker does not trip. Ask question asked 5 years 9 months ago. Start by turning the furnace off turn your thermostat to fan only and wait a few minutes.

Furnace blower motor won t turn off. These diagnostic steps are for an air handler blower or furnace fan that just won t quit running. Don t go calling your furnace repairman just yet though. The only way to get the blower to turn off was to shut off the breaker.