- Posted by admin
- On November 22, 2017
- Furnace Fan, Furnace Repair, Furnace Service, HAMCO
When the house temperature falls below what the thermostat is set at, the furnace kicks on and distributes heat until the desired temperature is reached. Once the house is nice and toasty, the burners and furnace fan should shut off until they’re needed again. However, some homeowners notice that the furnace fan doesn’t turn off, even when the furnace burners are off and are no longer producing warm air.
Incorrect Thermostat Settings
Incorrect thermostat settings are most often to blame when the furnace fan doesn’t turn off with the burners. When the furnace fan is set to ON, it means that the blower is constantly on—whether the furnace is producing warm air or not. Changing the setting to AUTO usually fixes the problem. On this correct setting, the fan only engages when the burners are on.
A dirty filter is the root of many furnace problems. As the filter gets dirtier and more clogged, it restricts airflow through the furnace. Warm air can get trapped in the furnace, and trip the limit switch—a safety feature built into the heating system. When this happens, the burners turn off but the furnace fan keeps pushing air throughout the home. If you’re having heating problems, check and replace the filter before calling for furnace repair.
If the above suggestions don’t solve your problem, you’ll need to call a heating professional — there could be a wiring problem with your thermostat or an issue with your limit switch that requires repair or replacement.
Book your repair online with HAMCO!
It’s quick and easy, and one of our certified professionals will contact you as soon as possible. Or, you can reach us at (905) 527-1049.
HAMCO Heating & Air Conditioning Ltd. has been serving the needs of Hamilton and the surrounding area since 1946. Our business is as much about our personal reputation and the relationships we build with our customers and neighbours as it is about selling and servicing home comfort systems. We don’t just work here in the area, we also live here and are a part of the community!