Common Questions: How do I know if my furnace burner needs replacement

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A concealed adjustment cover prevents unauthorized setpoint tampering

Built with corrosion-resistant inner and outer stainless steel cores

Lennox 56W25 Limit Switch 320788-704 Common Questions: How do IThe Lennox 56W25 Limit Switch is a critical OEM replacement part designed for high limit temperature monitoring in Lennox, Armstrong, and Ducane furnace assemblies. This normally closed safety component features a 3 inch insert length and operates on an automatic reset logic, ensuring the system remains protected without requiring manual intervention after a thermal event. It is engineered with a precise 250F cut out (open) temperature and a 220F cut