Reznor 221158 Limit Switch Els PW 17895 and Rheem/Ruud gas furnaces and

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

This switch functions as a temperature-actuated control that breaks the circuit when the temperature reaches 80°C (176°F) to prevent overheating

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

ensuring secure data logging and rapid fault finding without the latency of wireless alternatives

Reznor 221158 Limit Switch Els PW 17895 and Rheem/Ruud gas furnaces andThe 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