Lennox 56W23 Furnace Fan and Limit Control

The Lennox 56W23 is a combination fan and limit control designed for residential and light commercial furnace applications. This essential safety and operational component regulates both the blower fan cycling and high-temperature limit protection in compatible Lennox heating systems.

Key Features:

• Dual-function control combining fan operation and safety limit functions
• White-colored housing for easy identification during service
• Factory-calibrated settings for reliable temperature sensing
• Bimetal sensing element for accurate temperature monitoring
• Direct replacement for OEM part numbers R46105-008 and AST56W23

This control automatically activates the furnace blower when the heat exchanger reaches the appropriate temperature and shuts it off during the cooling cycle. The integrated limit switch provides critical overheat protection by shutting down the burner if unsafe temperatures are detected, helping prevent damage to the furnace and ensuring safe operation.

Application: Designed specifically for Lennox furnace models requiring part number 56W23. Always verify compatibility with your specific furnace model before installation.