How to Reset a Coleman Furnace Limit Switch
Open the cover of your circuit breaker box. Examine the furnace to locate the upper limit switch. Depress and release the red “Reset” button in the middle of the upper limit switch.Return to the circuit breaker box.
Where is the upper limit switch on a Coleman furnace?
The limit switch is a safety control switch located on the furnace just below the plenum. If the plenum gets too hot, the limit switch shuts off the burner. It also shuts off the blower when the temperature drops to a certain level after the burner has shut off.
Where is the reset switch on a Coleman furnace?
Locate the manual reset switch near the left side of your furnace blower. Your Coleman furnace has an upper limit switch for manual reset and a lower limit switch for automatic reset.
Can you reset a furnace limit switch?
How to Reset Furnace Limit Switch. Once the problem affecting your furnace has been identified and corrected, you should reset your furnace to continue enjoying the warmth on your home. In most gas furnace, this is done by simply shutting off the power supply and turning it back on after 20 or so seconds.
How do I know if my limit switch is bad?
The most common sign of a malfunctioning limit switch is the continuous operation of your furnace’s blower. Just as the limit switch won’t allow the fan to turn on until the warm air has reached the right temperature, the limit switch also shuts down when the air cools to a certain temperature.
Why does my furnace limit switch keep tripping?
If the air inside your furnace gets too hot, the limit switch trips to prevent overheating. If the furnace high limit switch trips due to overheating, there is likely an airflow issue that is preventing proper air movement through the system. Check your air filter, and replace it if dirty.
What is the limit switch on a furnace?
A furnace limit switch is a component of a forced-air furnace that is responsible for turning on the furnace blower once the desired heat has been met inside the furnace. Without a functioning furnace limit switch, a furnace would not be able to regulate the temperature in conjunction with a thermostat.
Does a Coleman furnace have a reset button?
Turn the Coleman furnace system switch to the “Off” position on the electric service panel. Locate the manual reset switch near the left side of your furnace blower. Press the reset button, which you will find in the middle of the limit switch.
Why is my Coleman furnace not blowing hot air?
Not heating? Most likely, either the electrical system providing your furnace’s power has shorted or the power switch has blown. Try resetting your furnace’s circuit breaker. If it has blown, you will need to replace it.
What causes a limit switch to be open?
Limit switch codes
The limit switch shuts off the burner when the temperature exceeds a preset temperature. When the temperature reduces to normal, the burner will come back on. The most common reason for limits to open is a plugged filter or a dirty blower wheel.
Why do limit switches go bad?
These problems are most commonly brought on by airflow issues in your system. When your furnace doesn’t have proper airflow, like when it is operating with a dirty filter, your heat exchanger will repeatedly overheat and put your limit switch through excess wear and tear. This can eventually cause it to malfunction.
