Your furnace, thermostat and blower all communicate with each other, allowing your heating system to keep your home in Villa Rica, GA, warm and cozy in the winter. The furnace limit switch acts as the link between these components and signals your system to shut off when it gets too hot. If you have a problem with your limit switch, you might notice the following signs:
Blowers Won’t Turn Off
Under normal circumstances, the limit switch tells the blowers to turn on when the system reaches a certain temperature. If the limit switch doesn’t operate properly because of a mechanical failure, a wiring issue or another problem, it may tell the blowers to keep working, even if the furnace isn’t that hot. If you notice air continually pushed through your ducts, have a service technician inspect your limit switch.
Short-Cycling Furnace
A faulty limit switch may think that the system is hotter than its actual temperature. As a result, it may signal the burners to shut off. However, the thermostat would signal the burners to turn back on, and this continuous cycle of turning on and off could lead to premature wear and tear on heating components.
No Air Coming Out of Vents
If you don’t feel any air coming from your vents, you may have to replace your furnace limit switch. Your limit switch might remain in the closed position, making it impossible for the blowers to activate. Alternatively, if the limit switch reads the furnace temperature incorrectly, it may never signal the blower to start.
With a bad furnace limit switch, you’ll notice clear indicators that your heating system is malfunctioning. Don’t wait to have your furnace fixed. Call Merrell & Associates to schedule a furnace repair appointment in or around Villa Rica, GA, today.
Image provided by iStock