Check Your Furnace Blower Fan To check your furnace’s blower fan for proper operation, start by turning your furnace to the ‘off’ position. Next, you will turn your thermostat to the ‘fan only’ mode. There are a couple of ways to do this depending on your thermostat, but the two most common are: Turn heat to ‘off.
After the burners have ignited, the next step in the heating cycle is starting of the blower motor. This will be done either by a heat-activated switch or internal timing.
Jan 24, 2017 – If your furnace fan won’t turn off, you most likely have one of these 3 problems: Your furnace fan limit switch is set to “manual override”; The fan.
Why won’t my furnace blower fan start on its own? It will run if I give it a “spin”. My gas heater isn’t working correctly. My thermostat signals the heater correctly and.
Feb 23, 2010 – A furnace blower fan is one of the main components in a hot air furnace or home heater system.
Dec 15, 2018 – It’s a frustrating experience to turn on your furnace, only to discover no. When you select “On,” the fan stays on even when the heat is off. 3 to 5 degrees above the room temperature, or else the furnace won’t come on at all.
And more often than not, the problem is that your furnace is just plain dirty: A dirty blower motor can lead to equipment failure. The heat exchanger won’t work.
A furnace door safety switch prevents the fan and burner from coming on while the access panel is removed. Furnaces have a safety swi.