Lennox 22W04 Blower Relay 340793-762 The Reznor 174809 Pressure Switch

The Reznor 174809 Pressure Switch is a critical OEM safety component designed for precise airflow monitoring in gas-fired heating units

supporting both 120V and 240V configurations

verify the bore size (typically 1/2 inch) and hub direction to ensure proper airflow alignment

with a factory default setting of 90 degrees

Lennox 22W04 Blower Relay 340793-762 The Reznor 174809 Pressure SwitchAs a field tested HVAC blower relay replacement, the Lennox 22W04 is a critical component for managing indoor blower motor operations. This Double Pole Single Throw (DPST) relay is engineered to handle high power hardware sequences using low power 24V thermostat signals. Whether you are troubleshooting an air handler blower motor that won't engage or a furnace that stays on after the call for heat has ended, this OEM part provides the precise