Reznor 221158 Limit Switch Els PW 17895 High-Temperature Durability: Engineered for hot

High-Temperature Durability: Engineered for hot water boilers with a maximum operating temperature of 320°F

this assembly features a premium ceramic insulator and a high-temperature silicon nitride ignitor element designed to withstand rapid thermal cycling without premature failure

and Rheem/Ruud gas furnaces and air handlers—always verify the model number on the rating plate

preventing terminal arcing and heat buildup

System Protection: Reduces the electrical load spike on the building’s power supply by sequencing high-amperage heating stages

Reznor 221158 Limit Switch Els PW 17895 High-Temperature Durability: Engineered for hotThe Reznor 221158 is a professional grade 145F manual reset limit switch designed for critical thermal protection in industrial and commercial HVAC systems. This genuine Reznor OEM component acts as a primary safety control, monitoring the heat exchanger and air plenum to prevent hazardous overheating conditions. Engineered with a fixed 145 degree Fahrenheit trip point, the switch interrupts the control circuit if internal temperatures exceed the safe