Sterling High Limit Switch for Gas Unit Heaters

The Sterling high limit switch is a replacement overheat safety control for Sterling and Beacon Morris gas-fired unit heaters. It is also called a high limit control, limit switch, or overheat switch. It monitors the temperature inside the heater. If the heat exchanger area gets too hot, it shuts off the gas burner. This helps protect the heater and the space around it.

Key Features:

• Overheat protection: Interrupts burner operation when temperatures exceed the safe limit.
• Automatic reset design: Temperature-sensing snap-disc style control that resets once the heater cools.
• OEM-style replacement: Built to match the original Sterling limit controls used in tubular and other gas unit heater designs.
• Range of configurations: Different temperature settings and mounting styles are offered across the product line to suit different heater series.
• Simple service item: A direct replacement for a worn or tripped limit control during heater maintenance.

Sterling has made gas unit heaters for commercial, industrial, and greenhouse use for more than 50 years. A working high limit switch is a key safety component. Replacing it when it is faulty or fails to reset helps the heater run reliably. Choose the correct part number for your heater model.