Armstrong Furnace R40154B010 Limit Switch Els PW 17895 While a 2-pole relay can

While a 2-pole relay can often substitute for a single-pole unit by using only one set of contacts

With 1/2 inch NPT threaded connections and a high-strength aluminum die-cast housing

A healthy reading is typically over 2

you preserve the precise electrical specifications needed for proper board communication and component longevity

ensuring exact compatibility with Bradford White power-vented draft transitions

Armstrong Furnace R40154B010 Limit Switch Els PW 17895 While a 2-pole relay canThe Armstrong Furnace R40154B010 Limit Switch is a critical high limit safety control engineered for precise thermal monitoring in residential heating systems. This L150 30 R40 limit switch is designed to open at 150F and features an automatic reset that closes once the temperature drops by 30F, typically around 120F. As an essential component for system protection, the R40154B010 (functionally identical to 40154B 010) prevents the heat exchanger from