543-155

Ensure the safety and efficiency of your heating system with this premium 3-inch furnace high limit switch. Designed as a critical safety component for residential gas furnaces, this limit control sensor monitors the air temperature within the heat exchanger. If internal temperatures exceed the safe threshold, the switch automatically interrupts power to the gas valve or ignition system to prevent overheating and potential equipment damage. Once the furnace cools to a safe operating temperature, the switch resets to allow for normal heating cycles. This durable replacement part is essential for maintaining proper furnace airflow safety and protecting your home from HVAC-related hazards. It is a vital component for restoring reliable performance to forced-air heating systems.
Type: Furnace High Limit Control Switch
Size: 3-inch insertion depth
Dimensions: 3 inches
Application: Used in residential gas furnaces and forced-air heating systems as a primary safety limit control to prevent heat exchanger overheating.
Specifications: Cut-out Temperature: 155°F; Differential: 30°F; Configuration: Opens on temperature rise (Normally Closed); Reset Type: Automatic reset.