Reznor 270390 Pressure Switch 321894-709 always verify the WC set

always verify the WC set point on the existing switch label before installation

70" wc trip point required by the manufacturer is maintained

ideal for serving a large appliance or several smaller units simultaneously

Quiet Operation: The resilient cradle base absorbs mechanical harmonics

it features a keyed shaft design to ensure positive drive and consistent 3rd generation performance

Reznor 270390 Pressure Switch 321894-709 always verify the WC setThe Reznor 270390 Pressure Switch is a critical OEM safety component designed for precise differential pressure sensing in unit heaters and HVAC systems. Known by its distinctive Brown Label, this switch ensures proper venting and combustion airflow before allowing the ignition sequence to proceed. As an essential HVAC replacement part, it is engineered to meet OEM specifications for Reznor gas fired equipment, providing the reliable performance