Armstrong furnace limit switch
Armstrong furnaces limit switches are designed to monitor and control certain elements of the furnace operation. In this article, we will provide an overview of what a furnace limit switch is, how it works and how it can be reset.
A 3-way limit switch is a mechanical device that includes three electrical contacts combined with three metal rods that move when activated. When the furnace’s ignition system powers up, the burner operates in one direction until the temperature reaches a set point. The limit switch then activates and directs power to a different contact in order to change directions on the burner assembly. This process continues until the desired combustion temperature is reached.
It is a procedure to reset the Armstrong furnace limit switch and can be done by following a few steps.
In order to reset the Armstrong furnace limit switch, one needs to take out the screws on the front of the panel and then pull out from below the front of the limit switch. Now, one needs to wait for about 10 minutes before reinserting it.
The furnace limit control switch is a safety device to shut down the furnace in case of an emergency. The switch must be reset or replaced if the furnace keeps tripping.
When the limit control switch on your furnace trips, it is important to reset it before continuing to use the heating system.
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