Reznor 57953 High Temperature Limit Switch - L170-40F

The Reznor 57953 is an automatic reset high-temperature limit switch designed for use in Reznor gas-fired unit heaters and HVAC systems. This critical safety component monitors plenum or heat exchanger temperatures to prevent overheating and protect your heating equipment from damage.

Key Features:

• Opens at 170°F and automatically resets at 130°F
• Auto-reset design eliminates the need for manual intervention
• Bimetal disc construction provides reliable temperature sensing
• 1/4 inch quick-disconnect spade terminals for easy installation
• Rated for loads up to 25 amps at 240VAC
• Factory OEM replacement part for Reznor heating equipment

This limit switch is commonly used in Reznor unit heater series including RX, CRX, RPV, REB, and other models requiring 170°F temperature protection. The automatic reset function allows the system to resume normal operation once temperatures return to safe levels, ensuring continuous heating performance with built-in safety protection.