Furnace High Limit Switch Reset

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.

Furnace high limit switch reset.

When the temperature reduces to normal the burner will come back on. Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. So check that first. It will be located at the top of the panel.

However the typical temperature settings are as follows. Flip the circuit breaker switch that corresponds to the goodman furnace to the off position to disrupt the. 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.

This is a very important safety feature because if the furnace overheats it can cause the heat exchanger to crack. Depending on your furnace model the. Remove the furnace access panel to get to the internal components. Locate your furnace s heating duct.

The blower will continue to run until either the system is reset or the limit switch closes. When the high limit switch trips the flame heating element will be shut off and the blower will continue to run to clear the heat. Another common type is the solid state high limit switch which is smaller a circular in design. Heating ducts are typically located in a home s basement or utility closet.

How to reset the limit switch on a goodman furnace step 1. The limit switch shuts off the burner when the temperature exceeds a preset temperature. The solid state switches sometimes have a reset button that should be checked for before replacing. It is best to consult the manual for your furnace if you want to reset the limit switch.

Look at each. These also should be tested with a multi meter for continuity. One common symptom of a failing or blocked heat exchanger is the roll out switch tripping. This happens because the flames are not being drawn into and throu.

In this episode of repair and replace vance shows how to replace the high limit switch in a gas furnace. Locate the white limit switch. The limit switch is a safety switch that monitors t. 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.

How to reset a furnace limit switch step 1. Grasp the sides of the panel and lift.