Lennox 26W85 Pressure Switch
Maintain precise combustion control with the Lennox 26W85 Pressure Switch, an essential dual-stage pressure switch designed for Lennox G61 furnace series and high-efficiency HVAC platforms. This OEM Lennox replacement part (part number 101021-09) features factory-calibrated set points of 0.90" W.C. for low-fire and 1.30" W.C. for high-fire stages. As a 2-stage pressure switch with SPST electrical configuration, it monitors the inducer motor's static pressure to ensure the vent system is clear and the combustion blower is performing within the safety parameters required for ignition. The robust 24V pressure sensor construction prevents short-cycling and nuisance trips caused by minor fluctuations, providing the reliability necessary for demanding commercial and residential applications. Technicians can rely on this switch for a direct-fit install in models like the G61MPV and G61MP, ensuring the HVAC safety limit circuit operates at peak performance without the need for field modifications or generic bracket adjustments.
Key Benefits- Dual-Stage Calibration: Factory set at 0.90/1.30" W.C. to match original engineering specs for 2-stage Lennox furnaces.
- OEM Reliability: Direct replacement for 101021-09, ensuring correct terminal alignment and mounting footprint for fast service calls.
- Airflow Monitoring: Critical SPST logic prevents gas valve operation if venting or inducer performance is compromised.
- Broad Compatibility: Fits high-efficiency Lennox G61 series units, including G61MP-60C and G61MPV-36C configurations.
- Durable Diaphragm: Engineered to withstand repeated cycling without losing calibration accuracy in varied environmental conditions.
What are the specific pressure ratings for the 26W85?
This switch is calibrated for a high-fire set point of 1.30" W.C. and a low-fire set point of 0.90" W.C. to support dual-stage inducer operation.
Can this part replace a single-stage pressure switch?
No, the 26W85 is a dual-stage switch designed specifically for 2-stage furnaces. Using it in a single-stage system will cause control board errors and system lockout.
How do I know if this switch is the cause of a furnace code?
Diagnostic LEDs on the furnace board typically indicate "Pressure Switch Open" or "Pressure Switch Stuck Closed." Use a manometer to verify the inducer is pulling the required 0.90"/1.30" W.C. before replacing the switch.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $56.62
-65%$56.62
$19.82Lennox 26W85 Pressure Switch
Maintain precise combustion control with the Lennox 26W85 Pressure Switch, an essential dual-stage pressure switch designed for Lennox G61 furnace series and high-efficiency HVAC platforms. This OEM Lennox replacement part (part number 101021-09) features factory-calibrated set points of 0.90" W.C. for low-fire and 1.30" W.C. for high-fire stages. As a 2-stage pressure switch with SPST electrical configuration, it monitors the inducer motor's static pressure to ensure the vent system is clear and the combustion blower is performing within the safety parameters required for ignition. The robust 24V pressure sensor construction prevents short-cycling and nuisance trips caused by minor fluctuations, providing the reliability necessary for demanding commercial and residential applications. Technicians can rely on this switch for a direct-fit install in models like the G61MPV and G61MP, ensuring the HVAC safety limit circuit operates at peak performance without the need for field modifications or generic bracket adjustments.
Key Benefits- Dual-Stage Calibration: Factory set at 0.90/1.30" W.C. to match original engineering specs for 2-stage Lennox furnaces.
- OEM Reliability: Direct replacement for 101021-09, ensuring correct terminal alignment and mounting footprint for fast service calls.
- Airflow Monitoring: Critical SPST logic prevents gas valve operation if venting or inducer performance is compromised.
- Broad Compatibility: Fits high-efficiency Lennox G61 series units, including G61MP-60C and G61MPV-36C configurations.
- Durable Diaphragm: Engineered to withstand repeated cycling without losing calibration accuracy in varied environmental conditions.
What are the specific pressure ratings for the 26W85?
This switch is calibrated for a high-fire set point of 1.30" W.C. and a low-fire set point of 0.90" W.C. to support dual-stage inducer operation.
Can this part replace a single-stage pressure switch?
No, the 26W85 is a dual-stage switch designed specifically for 2-stage furnaces. Using it in a single-stage system will cause control board errors and system lockout.
How do I know if this switch is the cause of a furnace code?
Diagnostic LEDs on the furnace board typically indicate "Pressure Switch Open" or "Pressure Switch Stuck Closed." Use a manometer to verify the inducer is pulling the required 0.90"/1.30" W.C. before replacing the switch.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
Maintain precise combustion control with the Lennox 26W85 Pressure Switch, an essential dual-stage pressure switch designed for Lennox G61 furnace series and high-efficiency HVAC platforms. This OEM Lennox replacement part (part number 101021-09) features factory-calibrated set points of 0.90" W.C. for low-fire and 1.30" W.C. for high-fire stages. As a 2-stage pressure switch with SPST electrical configuration, it monitors the inducer motor's static pressure to ensure the vent system is clear and the combustion blower is performing within the safety parameters required for ignition. The robust 24V pressure sensor construction prevents short-cycling and nuisance trips caused by minor fluctuations, providing the reliability necessary for demanding commercial and residential applications. Technicians can rely on this switch for a direct-fit install in models like the G61MPV and G61MP, ensuring the HVAC safety limit circuit operates at peak performance without the need for field modifications or generic bracket adjustments.
Key Benefits- Dual-Stage Calibration: Factory set at 0.90/1.30" W.C. to match original engineering specs for 2-stage Lennox furnaces.
- OEM Reliability: Direct replacement for 101021-09, ensuring correct terminal alignment and mounting footprint for fast service calls.
- Airflow Monitoring: Critical SPST logic prevents gas valve operation if venting or inducer performance is compromised.
- Broad Compatibility: Fits high-efficiency Lennox G61 series units, including G61MP-60C and G61MPV-36C configurations.
- Durable Diaphragm: Engineered to withstand repeated cycling without losing calibration accuracy in varied environmental conditions.
What are the specific pressure ratings for the 26W85?
This switch is calibrated for a high-fire set point of 1.30" W.C. and a low-fire set point of 0.90" W.C. to support dual-stage inducer operation.
Can this part replace a single-stage pressure switch?
No, the 26W85 is a dual-stage switch designed specifically for 2-stage furnaces. Using it in a single-stage system will cause control board errors and system lockout.
How do I know if this switch is the cause of a furnace code?
Diagnostic LEDs on the furnace board typically indicate "Pressure Switch Open" or "Pressure Switch Stuck Closed." Use a manometer to verify the inducer is pulling the required 0.90"/1.30" W.C. before replacing the switch.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
