The furnace limit switch is an important safety component in any residential or commercial HVAC system. Given this, it’s in your best interest to be as informed as possible about this component to avoid any issues or problems down the line. To make things easier for you, here’s everything you need to know about furnace limit switches.
What is a Furnace Limit Switch?
The furnace limit switch is designed to shut off the furnace if the temperature inside the furnace gets too high. Without a limit switch, your furnace could overheat and cause a fire. In this blog post, we’ll explain what a furnace limit switch is, how it works, and why it’s important to keep it in good working order.
A furnace limit switch is a type of safety switch that is mounted inside the furnace. This switch is triggered when the temperature inside the furnace reaches a certain point. The limit switch is designed to shut off the furnace before it gets too hot, preventing the risk of overheating and fire. The temperature at which the limit switch is triggered is usually between 130 and 160 degrees Fahrenheit.
When the furnace limit switch is triggered, the furnace will shut off until the temperature inside the furnace drops below the limit switch’s set point. The furnace will then restart and continue to operate normally. However, if the furnace limit switch is not working properly, it may not shut off the furnace when the temperature reaches a dangerous level. This can be a major safety hazard and should be addressed immediately.
How Do You Keep Your Furnace Limit Switch in Good Condition?
It’s important to keep your furnace limit switch in good working order. Regularly inspect the switch for signs of wear or damage. To keep your furnace limit switch in good condition, it’s also important to keep it clean. This can be done by using compressed air to blow out any dust or debris that may have accumulated inside the switch. It’s also important to check the wiring of your furnace limit switch periodically. If any of the wires have become loose or frayed, they should be replaced.
Aside from what we’ve already mentioned, it’s also vital to make sure that the furnace limit switch is the correct size for the furnace. If the switch is too small, it won’t be able to sense the temperature accurately, leading to the furnace shutting down prematurely. If the switch is too large, it could lead to the furnace shutting down too late, allowing the furnace to become dangerously hot.
Conclusion
Overall, the furnace limit switch is an important safety component in any HVAC system. It is designed to shut off the furnace before it gets too hot, preventing the risk of overheating and fire. Make sure to regularly inspect the switch for signs of wear or damage and contact a professional HVAC technician if needed. By keeping your furnace limit switch in good working order, you can ensure the safety of your home or office.
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