Furnace High Limit Switch Reset

This is a very important safety feature because if the furnace overheats it can cause the heat exchanger to crack.

Furnace high limit switch reset.

One common symptom of a failing or blocked heat exchanger is the roll out switch tripping. Locate your furnace s heating duct. How to reset the limit switch on a goodman furnace step 1. If the high limit switch is tripped by overheating several times in a row then the furnace will go into lockout mode where it will not turn back on at all until it s serviced and reset.

The limit switch shuts off the burner when the temperature exceeds a preset temperature. It will be located at the top of the panel. I believe high limit switches are normally closed and they should always fail open. Depending on your furnace model the.

Look at each. Locate the white limit switch. It is best to consult the manual for your furnace if you want to reset the limit switch. Heating ducts are typically located in a home s basement or utility closet.

Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. In this episode of repair and replace vance shows how to replace the high limit switch in a gas furnace. Then turn on the power and let the furnace restart. The instructions differ depending on whether you have a combination switch or separate high and fan control limit switches as well as on the specific model you have.

The blower will continue to run until either the system is reset or the limit switch closes. When the temperature reduces to normal the burner will come back on. The solid state switches sometimes have a reset button that should be checked for before replacing. The limit switch is a safety switch that monitors t.

Flip the circuit breaker switch that corresponds to the goodman furnace to the off position to disrupt the. These also should be tested with a multi meter for continuity. Grasp the sides of the panel and lift. Flip the furnace power switch to off and wait for at least five minutes.

Another common type is the solid state high limit switch which is smaller a circular in design. This happens because the flames are not being drawn into and throu. Remove the furnace access panel to get to the internal components. So check that first.

Repair experts tell us that they often show up at a residence only to find that the unit isn t getting power because of a tripped breaker or a flipped switch. How to reset a furnace limit switch step 1.