Lennox 26W45 Pressure Switch
The Lennox 26W45 Pressure Switch is a critical safety component designed for two-stage gas furnaces, specifically engineered to monitor combustion air pressure within the inducer assembly. This dual-stage pressure switch features precise set points of 0.90" WC and 1.50" WC, ensuring the system only proceeds with the ignition sequence when sufficient airflow is present for safe combustion. Built for high-reliability in Lennox and Armstrong Air systems, this switch prevents the furnace from operating under restricted venting conditions or inducer motor failure. As a direct OEM replacement pressure switch, the 26W45 provides the exact electrical specifications and vacuum port orientation required to maintain the original equipment's UL certification and performance standards. When diagnosing pressure switch lockout codes, this component ensures accurate sensing of the pressure differential, preventing nuisance trips while maintaining strict adherence to safety protocols during high and low-fire stages.
Technical Key Benefits:
- Dual-Stage Precision: Manages complex furnace pressure switch testing and operation with specific 0.90" and 1.50" WC thresholds.
- OEM Compatibility: Exact fit for Lennox 26W45 and compatible Armstrong Air HVAC parts to ensure seamless integration.
- Durable Diaphragm Construction: Engineered to withstand high-cycle operation and temperature fluctuations within the furnace cabinet.
- Safety Compliance: Prevents gas valve activation if the venting system or heat exchanger is obstructed.
Common Technical Questions:
How do I troubleshoot a 26W45 pressure switch stuck open?
Verify the inducer motor is reaching full RPM, check for obstructions in the flue pipe, and inspect the vacuum tubing for cracks or moisture. Use a manometer to confirm the system is pulling a vacuum that exceeds the 0.90" or 1.50" WC set points.
Can I use a single-stage switch to replace this dual-stage component?
No. The furnace control board expects a specific sequence of closure from both stages of the Lennox furnace pressure switch to enable high-fire operation. Using a mismatched switch will result in system lockout or inefficient performance.
What causes these switches to fail prematurely?
Environmental factors like excessive moisture in the pressure lines or dust buildup on the internal contacts are common causes. Ensure the furnace is properly leveled and the drain lines are clear to prevent backup into the inducer housing.
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: $55.01
-65%$55.01
$19.25Lennox 26W45 Pressure Switch
The Lennox 26W45 Pressure Switch is a critical safety component designed for two-stage gas furnaces, specifically engineered to monitor combustion air pressure within the inducer assembly. This dual-stage pressure switch features precise set points of 0.90" WC and 1.50" WC, ensuring the system only proceeds with the ignition sequence when sufficient airflow is present for safe combustion. Built for high-reliability in Lennox and Armstrong Air systems, this switch prevents the furnace from operating under restricted venting conditions or inducer motor failure. As a direct OEM replacement pressure switch, the 26W45 provides the exact electrical specifications and vacuum port orientation required to maintain the original equipment's UL certification and performance standards. When diagnosing pressure switch lockout codes, this component ensures accurate sensing of the pressure differential, preventing nuisance trips while maintaining strict adherence to safety protocols during high and low-fire stages.
Technical Key Benefits:
- Dual-Stage Precision: Manages complex furnace pressure switch testing and operation with specific 0.90" and 1.50" WC thresholds.
- OEM Compatibility: Exact fit for Lennox 26W45 and compatible Armstrong Air HVAC parts to ensure seamless integration.
- Durable Diaphragm Construction: Engineered to withstand high-cycle operation and temperature fluctuations within the furnace cabinet.
- Safety Compliance: Prevents gas valve activation if the venting system or heat exchanger is obstructed.
Common Technical Questions:
How do I troubleshoot a 26W45 pressure switch stuck open?
Verify the inducer motor is reaching full RPM, check for obstructions in the flue pipe, and inspect the vacuum tubing for cracks or moisture. Use a manometer to confirm the system is pulling a vacuum that exceeds the 0.90" or 1.50" WC set points.
Can I use a single-stage switch to replace this dual-stage component?
No. The furnace control board expects a specific sequence of closure from both stages of the Lennox furnace pressure switch to enable high-fire operation. Using a mismatched switch will result in system lockout or inefficient performance.
What causes these switches to fail prematurely?
Environmental factors like excessive moisture in the pressure lines or dust buildup on the internal contacts are common causes. Ensure the furnace is properly leveled and the drain lines are clear to prevent backup into the inducer housing.
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
The Lennox 26W45 Pressure Switch is a critical safety component designed for two-stage gas furnaces, specifically engineered to monitor combustion air pressure within the inducer assembly. This dual-stage pressure switch features precise set points of 0.90" WC and 1.50" WC, ensuring the system only proceeds with the ignition sequence when sufficient airflow is present for safe combustion. Built for high-reliability in Lennox and Armstrong Air systems, this switch prevents the furnace from operating under restricted venting conditions or inducer motor failure. As a direct OEM replacement pressure switch, the 26W45 provides the exact electrical specifications and vacuum port orientation required to maintain the original equipment's UL certification and performance standards. When diagnosing pressure switch lockout codes, this component ensures accurate sensing of the pressure differential, preventing nuisance trips while maintaining strict adherence to safety protocols during high and low-fire stages.
Technical Key Benefits:
- Dual-Stage Precision: Manages complex furnace pressure switch testing and operation with specific 0.90" and 1.50" WC thresholds.
- OEM Compatibility: Exact fit for Lennox 26W45 and compatible Armstrong Air HVAC parts to ensure seamless integration.
- Durable Diaphragm Construction: Engineered to withstand high-cycle operation and temperature fluctuations within the furnace cabinet.
- Safety Compliance: Prevents gas valve activation if the venting system or heat exchanger is obstructed.
Common Technical Questions:
How do I troubleshoot a 26W45 pressure switch stuck open?
Verify the inducer motor is reaching full RPM, check for obstructions in the flue pipe, and inspect the vacuum tubing for cracks or moisture. Use a manometer to confirm the system is pulling a vacuum that exceeds the 0.90" or 1.50" WC set points.
Can I use a single-stage switch to replace this dual-stage component?
No. The furnace control board expects a specific sequence of closure from both stages of the Lennox furnace pressure switch to enable high-fire operation. Using a mismatched switch will result in system lockout or inefficient performance.
What causes these switches to fail prematurely?
Environmental factors like excessive moisture in the pressure lines or dust buildup on the internal contacts are common causes. Ensure the furnace is properly leveled and the drain lines are clear to prevent backup into the inducer housing.
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.
