Heil 1009169 Furnace Limit Switch 250°F 20°F Differential

The Heil 1009169 is an automatic reset furnace limit switch designed for gas furnace applications. This critical safety component protects your HVAC system from overheating by monitoring internal temperatures and shutting down burner operation when necessary.

Key Features:

• Temperature set point: 250°F with 20°F differential
• Opens at 250°F and automatically resets at 230°F
• Automatic reset functionality for convenience and reliability
• Compatible with Heil, International Comfort Products (ICP), Tempstar, Comfortmaker, and Arcoaire systems
• Direct OEM replacement part

This limit switch is a vital safety device that prevents damage to your furnace's heat exchanger and other critical components by interrupting power to the gas valve when temperatures exceed safe operating limits. The 20-degree differential ensures proper cycling while maintaining system protection. When the furnace temperature reaches 250°F, the switch opens to shut off the burners while allowing the blower fan to continue running to cool the system. Once temperature drops to 230°F, the switch automatically resets for normal operation.