Heil Automatic Limit Switch F

The Heil automatic limit switch (also called a furnace limit switch, high limit switch or limit control) is an OEM replacement part for Heil and related ICP-brand gas furnaces and HVAC heating equipment. It monitors the temperature inside the furnace plenum. If the temperature gets too high, it opens the burner circuit.

Key Features:

• Automatic reset operation: the circuit closes again once the furnace cools to the reset temperature. No manual intervention is needed.
• Overheat protection: shuts down the burner circuit to help protect the heat exchanger and other furnace components from excessive heat.
• Temperature-rated design: available in a range of temperature ratings, so you can match the switch to the original component.
• OEM-style replacement: built to restore the original factory limit control function.
• Simple installation: uses standard terminal connections and mounts in the same way as the original control.

A failing or tripping limit switch can cause short-cycling or a no-heat condition. Replacing it restores proper furnace safety and operation. Select the variant whose part number and temperature rating match your original limit switch.