Reznor High Temperature Limit Switch

The Reznor High Temperature Limit Switch (also called a limit control or high limit safety switch) is a replacement control for Reznor heating equipment. It is a safety device. It monitors the temperature of the air passing over the heat exchanger and shuts off the heater if the system overheats.

Key Features:

• Overheat protection that helps keep the heater within safe operating temperatures
• Replacement control for Reznor unit heaters and garage heaters
• Made for Reznor by Nortek
• Each variant has its own temperature rating, so choose the one that matches the part number you are replacing

A failed or out-of-calibration limit switch can cause symptoms such as no heat, not enough heat, or short cycling. Replacing it restores the safety shutoff that protects the heater and its heat exchanger.