Lennox 26W83 2-stage Pressure Switch Hvac

Product Description

The LENNOX 26W83 is a 2-stage pressure switch designed for use in HVAC systems, specifically gas furnace applications. It operates with two independent switching stages: a high set point of 0.85 inches W.C. and a low set point of 0.87 inches W.C. The switch monitors inducer and combustion air pressure to confirm safe operating conditions before allowing ignition to proceed. Licensed HVAC technicians install and service this component as part of routine furnace diagnostics and repair.

This pressure switch is suited for residential gas furnace installations where two-stage pressure sensing is required. It replaces OEM part number 101021-07 and is intended for systems that require independent high and low pressure confirmation during furnace operation. The dual set-point design allows the furnace control board to verify both stages of inducer operation before advancing through the ignition sequence.

Key Features

• Two independent switching stages for precise pressure monitoring
• High set point at 0.85 inches W.C.
• Low set point at 0.87 inches W.C.
• OEM replacement for Lennox part number 101021-07
• Designed to confirm safe combustion air pressure prior to ignition

Compatibility

Replaces Lennox OEM part number 101021-07. Designed as an OEM-style replacement for residential gas furnace applications requiring a 2-stage pressure switch.

Installation Notes

Installation and replacement of pressure switches must be performed by a licensed HVAC technician. Shut off power to the furnace and close the gas supply valve before beginning service. Inspect the pressure tubing for cracks, blockages, or moisture before connecting to the new switch. Verify proper set-point operation after installation using a manometer before returning the system to service.

Technical Specifications

• Set Point High: 0.85 inches W.C.
• Set Point Low: 0.87 inches W.C.
• Switch Stages: 2

Standard Information

• Brand: LENNOX
• Manufacturer Part Number: 26W83