Joseph is an HVAC technician and a hobbyist blogger. He’s been working as an HVAC technician for almost 13 years, and he started blogging just...Read more
Have you ever had your furnace high limit switch trip? It can be pretty annoying, especially if it happens in the middle of winter. In this blog post, we’ll explain what a furnace high limit switch is, and we’ll give you some tips on how to prevent it from tripping. Read on to learn more!
What Is a Furnace Limit Switch?
A furnace limit switch is a safety device that is installed in furnaces. It is designed to shut off the furnace if the temperature inside the furnace gets too high. The limit switch is usually located near the bottom of the furnace, where it can monitor the temperature of the air coming into the furnace. If the air temperature rises above a certain level, the limit switch will trip and shut off the furnace.
The limit switch is a important safety feature that can help prevent fires in furnaces. If your furnace does not have a limit switch, you should consider having one installed. Limit switches are relatively inexpensive and can provide peace of mind knowing that your furnace is equipped with a safety device
A furnace limit switch is a safety device found in most modern furnaces. It is designed to prevent the furnace from overheating, and it does this by shutting off the furnace if it detects that it is getting too hot. Furnace limit switches are usually located near the blower compartment, and they are typically made out of plastic or metal.
If your furnace stops working and you suspect that the limit switch is to blame, you can check it yourself by removing the cover panel and looking for the switch. If it’s damaged or dirty, you can clean or replace it as needed.
Why a Furnace High Limit Switch Trips?
The high limit switch on a furnace is designed to protect the heat exchanger from overheating. The switch is usually located on or near the furnace. If the furnace gets too hot, the switch will trip and shut off the gas to the furnace.
There are several reasons why a furnace high limit switch may trip. The most common reason is that the furnace is overheating. This can be caused by a number of things, including a dirty air filter, a blocked flue pipe, or a problem with the blower motor. Other possible causes include a faulty thermostat, a bad limit switch, or an electrical problem.
If your furnace high limit switch keeps tripping, it’s important to have a qualified technician take a look at it. They will be able to diagnose the problem and make any necessary repairs.
What To Do If Your Furnace’s High Limit Switch Is Tripping
If your furnace’s high limit switch is tripping, it could be due to a few different reasons. First, check to make sure that the switch is not dirty or obstructed. If the switch is clean and clear, then the next step is to check the furnace’s air filter.
If the air filter is dirty, it can restrict airflow and cause the high limit switch to trip. Clean or replace the air filter and see if that fixes the problem.
If the high limit switch continues to trip, there could be a more serious problem with your furnace. It’s best to call a professional for help in this case. They can diagnose the problem and make the necessary repairs.
How To Clean Or Replace A Furnace High Limit Switch?
If your furnace’s high limit switch keeps tripping, it’s important to clean or replace it as soon as possible. A furnace high limit switch is a safety device that shuts off the furnace if the temperature gets too high. If the high limit switch trips, it means that the furnace is getting too hot and is in danger of overloading the electrical system or starting a fire.
To clean the high limit switch, turn off the power to the furnace and remove the switch from its mounting bracket. Use a wire brush to clean any dirt or debris from the switch. If the switch is damaged, it will need to be replaced.
If you’re not comfortable working with electrical components, it’s best to call a professional to service your furnace. A professional will be able to properly diagnose the problem and make any necessary repairs.
What Causes a Furnace High Limit Switch to Trip?
The high limit switch is designed to trip and shut off the furnace if the temperature gets too high. This is a safety feature that protects your furnace from overheating and potentially causing a fire. There are several reasons why the high limit switch might trip, including:
- Dirty air filter: A dirty air filter can restrict airflow to the furnace, causing it to overheat.
- Furnace overheating: If the furnace itself is overheating, the high limit switch will trip to shut it off. This could be caused by a number of things, including a blocked flue or vent, or a problem with the furnace itself.
- Thermostat set too high: If the thermostat is set too high, it can cause the furnace to overheat.
- Room temperature too high: If the room temperature gets too high, it can cause the furnace to overheat. This could be caused by a number of things, including a blocked flue or vent, or a problem with the furnace itself.
If the high limit switches trips, it’s important to find out what caused it. If it was just a dirty air filter, you can simply clean or replace the filter and reset the switch. But if the furnace itself is overheating, you’ll need to find the cause of the problem and fix it before resetting the switch. Otherwise, the furnace could overheat again and potentially cause a fire.
If your limit switch keeps tripping, a few things could be causing the problem. First, check to see if the switch is dirty or damaged. If so, clean or replace the switch. Next, check to see if the wires leading to the switch are loose or frayed. If so, tight or replace them. Finally, check to see if the switch itself is defective. If so, you’ll need to replace the switch.
Furnace high limit switch keeps tripping- There can be a number of reasons why your furnace’s high limit switch is tripping, from something as simple as a dirty filter to a more serious problem such as a gas leak. In this blog post, we’ll explore some common causes of the high limit switch tripping and what you can do about it.
Joseph is an HVAC technician and a hobbyist blogger. He’s been working as an HVAC technician for almost 13 years, and he started blogging just a couple of years ago. Joseph loves to talk about HVAC devices, their uses, maintenance, installation, fixing, and different problems people face with their HVAC devices. He created Hvacbuster to share his knowledge and decade of experiences with people who don’t have any prior knowledge about these devices.More Posts