Compact NEMA 1 enclosure protects internal components while saving space in cramped mechanical rooms

Auto-Reset Functionality: Automatically resets once temperatures drop 30 degrees below the 220°F trip point

making it a go-to solution for contractors managing air-handling unit interlocks or fan status monitoring

Constructed with durable materials and weighing only 2

Reznor 203933 Pressure Switch Els PW 17895 Compact NEMA 1 enclosure protectsThe Reznor 203933 Pressure Switch is a critical safety component designed for precise airflow monitoring in commercial and industrial heating and ventilation systems. This genuine OEM part features a 0. 75" WC setpoint, ensuring the inducer motor or venter assembly is moving sufficient combustion air before allow the gas valve to energize. Built with a SPDT (Single Pole Double Throw) switch configuration, the 203933 provides versatile electrical