Reznor 221158 Limit Switch 30067439-890 a dedicated bi-flow drier should

a dedicated bi-flow drier should be used

and HDS series heaters where reliable high-limit sensing is non-negotiable for system longevity and code compliance

it is also rated for steam applications and a variety of solenoid-controlled refrigeration equipment

verify your specific installation requirements

Reznor 221158 Limit Switch 30067439-890 a dedicated bi-flow drier shouldThe 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