Durable Sensing Element: The 1/2-inch diameter

The Weil McLain 591-391-919 Wiring Harness is a critical 9-pin interface engineered specifically for Series 4 CGa gas-fired water boilers

Key Benefits DPST Snap-Action: Provides a clean break on both poles

provides robust protection against moisture ingress and dust

Common Questions: Where is the limit switch located on a Lennox furnace

Lennox 59M03 Flue Transition Kit Refrigerant Durable Sensing Element: The 1/2-inchThe Lennox 59M03 Flue Transition Kit (mfg part LB 106783A) is a critical OEM component designed to manage combustion exhaust and condensate drainage in high efficiency 90% AFUE furnaces. As a direct replacement for Lennox 18J20, 18J2001, 59M0301, and Armstrong R41093 001, this kit standardizes the flue transition assembly for series including the G26, G32, and 90UGF models. It is specifically engineered to improve water drainage into the cold end