Allied Air 11U65 Pressure Switch 0.60 Inches Wc

Product Description

The ALLIED AIR 11U65 is a pressure switch rated to actuate at 0.60 inches water column (W.C.), designed for use in gas furnace combustion-air proving circuits. This switch monitors negative pressure created by the inducer motor and signals the control board that proper draft conditions exist before allowing ignition to proceed. It is a direct-replacement component installed by licensed HVAC technicians during routine maintenance, combustion troubleshooting, or inducer system repair. The 0.60 inches W.C. setpoint is a common specification in residential gas furnace applications and must be matched precisely to the furnace design to ensure safe and reliable operation.

This pressure switch is suited to residential gas furnace installations where the original equipment calls for a 0.60 inches W.C. actuation point. It is referenced as a replacement for Lennox part number 104371-02, making it applicable to Lennox-platform furnace models that carry that OEM designation. Allied Air furnaces sharing the same platform architecture are also typical candidates for this switch. Installation is appropriate wherever the OEM specification matches the actuation setpoint of this part.

Key Features

• Actuates at 0.60 inches water column (W.C.) for precise draft-proving control
• Direct OEM-style replacement for Lennox 104371-02
• Designed to integrate with standard furnace control board low-voltage proving circuits
• Critical safety component that prevents ignition without confirmed inducer draft

Compatibility

Referenced as a replacement for Lennox part number 104371-02. Designed for residential gas furnaces requiring a 0.60 inches W.C. pressure switch actuation setpoint.

Installation Notes

Pressure switches are installed by licensed HVAC technicians. Shut off power to the furnace at the disconnect and set the thermostat to off before beginning work. Inspect the rubber tubing connecting the pressure port to the inducer housing for cracks or blockages, as a faulty hose is a common cause of pressure switch failure independent of the switch itself. Verify the replacement switch setpoint matches the furnace manufacturer specification exactly before placing the unit in service.

Technical Specifications

• Actuation Setpoint: 0.60 inches W.C.
• Replaces OEM Part: Lennox 104371-02

Standard Information

• Brand: ALLIED AIR
• Manufacturer Part Number: 11U65