Reznor 270389 Pressure Switch R-22 this flange is specific to

this flange is specific to Aaon equipment geometry

If you detect air whistling or localized condensation near the access panels

Key Benefits OEM Compatibility: Exact fit for Reznor UA and XL series (30-105) eliminates field modifications

Streamlined Installation: Compact design and standard terminals facilitate a fast HVAC pressure switch replacement

Common Questions Is the SZ1020 compatible with heat pump systems

Reznor 270389 Pressure Switch R-22 this flange is specific toThe Reznor 270389 Pressure Switch is a critical safety component calibrated to a . 33" WC set point, specifically engineered for Reznor unit heaters. This differential air pressure switch monitors the pressure drop across the heat exchanger, ensuring the induced draft blower is operating at the correct static pressure before allowing the ignition sequence to proceed. As a genuine OEM Reznor replacement part, it maintains the precise factory