International Comfort Products Furnace High Limit Switch

The International Comfort Products Furnace High Limit Switch (also called a furnace limit switch, high limit control or thermal limit switch) is a safety control for gas and electric forced-air furnaces. It monitors the temperature inside the furnace plenum and heat exchanger area. If the temperature goes above a safe level, it opens the circuit to shut off the burner or heat source. This helps protect the furnace and the home from overheating.

Key Features:

• Temperature-activated safety switch that interrupts the heating cycle when the temperature is too high
• Automatically resets once the furnace cools, so normal operation can resume
• Helps protect the heat exchanger, blower compartment and other furnace components from heat damage
• Replacement part for International Comfort Products furnace systems
• Available in several temperature ratings and configurations, so you can match the control to your furnace's original specifications

A failing high limit switch can cause nuisance shutdowns, short cycling or no heat. Replacing it restores the furnace's built-in overheat protection. Before installing, turn off power to the furnace and check the part number and temperature rating against your original control.