or a compromised secondary heat exchanger causing flue gases to backup

For maximum component life

This unit includes the OEM-style pin harness for a literal plug-and-play installation on compatible HVAC controls

Designed to withstand high-temperature combustion environments

For the mechanical contractor

Reznor 234054 Pressure Switch 340793-762 or a compromised secondary heatThe Reznor 234054 Pressure Switch is a critical safety component designed for precise differential pressure sensing in Reznor unit heaters. Calibrated to a 0. 20" WC setpoint, this single pole, double throw (SPDT) switch monitors the pressure drop across the heat exchanger, ensuring the induced draft motor is providing adequate airflow for safe combustion. Primarily utilized in UDAP, UDAS, UDX, and SDX series gas fired units, it serves as a reliable