Lennox 18J37 Limit Switch Built with a corrosion-resistant one-piece

Built with a corrosion-resistant one-piece steel motor shaft and moisture-proof windings

this component is critical for isolating the refrigerant charge during system maintenance

this is an auxiliary switch designed for pilot duty and control signals

which is the standard for Honeywell and Barber-Colman linkage kits

Circuit Protection: Features a manual reset breaker to protect the secondary circuit from shorts and overloads

Lennox 18J37 Limit Switch Built with a corrosion-resistant one-pieceThe Lennox 18J37 Limit Switch is a critical safety component engineered for high performance thermal regulation in residential and light industrial furnaces. As a normally closed disc style limit control, this genuine OEM Lennox replacement part is specifically designed to prevent heat exchanger damage by interrupting the burner circuit if internal temperatures exceed safety thresholds. Featuring a yellow color coded sleeve for rapid field