Lennox 80W57 Pressure Switch
The Lennox 80W57 Pressure Switch is a critical safety component designed for single-stage gas furnaces. This genuine OEM Lennox furnace pressure switch is calibrated to actuate at -.65" WC (water column), ensuring that the combustion air inducer motor is generating sufficient negative pressure before the ignition sequence begins. Engineered with a single-pole single-throw (SPST) configuration and Normally Open (N.O.) contacts, this switch protects the system by interrupting operation if it detects restricted venting or inducer failure. Constructed for high-duty cycles, the 80W57 features a standard 1/4" barb connection for seamless integration with existing vacuum tubing. It is a direct replacement for multiple part numbers, including 103247-09 and 103018-09, and is compatible with a wide range of Lennox, Armstrong, and AirEase equipment. For technicians, this switch provides a precise 0.65-inch trigger point, maintaining the thin line between reliable heating and essential system safety. Utilizing genuine Lennox HVAC parts ensures exact electrical ratings of 5A at 24 VAC, preventing the common nuisance trips associated with universal aftermarket alternatives.
Key Benefits:
- Precise Safety Monitoring: Calibrated specifically to -.65" WC to ensure proper flue gas venting and prevent carbon monoxide backdrafting.
- OEM Compatibility: Replaces Lennox 103247-09 and fits various Allied Air brands, ensuring the mounting holes and 1/4" barb line up perfectly.
- Industrial-Grade Build: Features a durable diaphragm and SPST normally open contacts rated for 24V control circuits.
- Direct Fitment: Eliminates the need for bracket modifications in EL180 and ML180 series furnaces.
Common Questions:
- Why is my furnace showing a "Pressure Switch Open" code? This often indicates the inducer motor isn't pulling enough vacuum, the 80W57 diaphragm has failed, or there is a blockage in the 1/4" barb connection or flue pipe.
- Can I use a universal switch instead of the 80W57? While possible, universal switches often lack the exact -.65" WC set point, which can lead to unsafe operation or frequent ignition failures.
- Will this fix a furnace that starts then stops? If the inducer runs but the burners don't ignite, a failing SPST pressure switch is a primary suspect for the interrupted cycle.
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: $37.37
-65%$37.37
$13.08Lennox 80W57 Pressure Switch
The Lennox 80W57 Pressure Switch is a critical safety component designed for single-stage gas furnaces. This genuine OEM Lennox furnace pressure switch is calibrated to actuate at -.65" WC (water column), ensuring that the combustion air inducer motor is generating sufficient negative pressure before the ignition sequence begins. Engineered with a single-pole single-throw (SPST) configuration and Normally Open (N.O.) contacts, this switch protects the system by interrupting operation if it detects restricted venting or inducer failure. Constructed for high-duty cycles, the 80W57 features a standard 1/4" barb connection for seamless integration with existing vacuum tubing. It is a direct replacement for multiple part numbers, including 103247-09 and 103018-09, and is compatible with a wide range of Lennox, Armstrong, and AirEase equipment. For technicians, this switch provides a precise 0.65-inch trigger point, maintaining the thin line between reliable heating and essential system safety. Utilizing genuine Lennox HVAC parts ensures exact electrical ratings of 5A at 24 VAC, preventing the common nuisance trips associated with universal aftermarket alternatives.
Key Benefits:
- Precise Safety Monitoring: Calibrated specifically to -.65" WC to ensure proper flue gas venting and prevent carbon monoxide backdrafting.
- OEM Compatibility: Replaces Lennox 103247-09 and fits various Allied Air brands, ensuring the mounting holes and 1/4" barb line up perfectly.
- Industrial-Grade Build: Features a durable diaphragm and SPST normally open contacts rated for 24V control circuits.
- Direct Fitment: Eliminates the need for bracket modifications in EL180 and ML180 series furnaces.
Common Questions:
- Why is my furnace showing a "Pressure Switch Open" code? This often indicates the inducer motor isn't pulling enough vacuum, the 80W57 diaphragm has failed, or there is a blockage in the 1/4" barb connection or flue pipe.
- Can I use a universal switch instead of the 80W57? While possible, universal switches often lack the exact -.65" WC set point, which can lead to unsafe operation or frequent ignition failures.
- Will this fix a furnace that starts then stops? If the inducer runs but the burners don't ignite, a failing SPST pressure switch is a primary suspect for the interrupted cycle.
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.
Product Information
Product Information
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Description
The Lennox 80W57 Pressure Switch is a critical safety component designed for single-stage gas furnaces. This genuine OEM Lennox furnace pressure switch is calibrated to actuate at -.65" WC (water column), ensuring that the combustion air inducer motor is generating sufficient negative pressure before the ignition sequence begins. Engineered with a single-pole single-throw (SPST) configuration and Normally Open (N.O.) contacts, this switch protects the system by interrupting operation if it detects restricted venting or inducer failure. Constructed for high-duty cycles, the 80W57 features a standard 1/4" barb connection for seamless integration with existing vacuum tubing. It is a direct replacement for multiple part numbers, including 103247-09 and 103018-09, and is compatible with a wide range of Lennox, Armstrong, and AirEase equipment. For technicians, this switch provides a precise 0.65-inch trigger point, maintaining the thin line between reliable heating and essential system safety. Utilizing genuine Lennox HVAC parts ensures exact electrical ratings of 5A at 24 VAC, preventing the common nuisance trips associated with universal aftermarket alternatives.
Key Benefits:
- Precise Safety Monitoring: Calibrated specifically to -.65" WC to ensure proper flue gas venting and prevent carbon monoxide backdrafting.
- OEM Compatibility: Replaces Lennox 103247-09 and fits various Allied Air brands, ensuring the mounting holes and 1/4" barb line up perfectly.
- Industrial-Grade Build: Features a durable diaphragm and SPST normally open contacts rated for 24V control circuits.
- Direct Fitment: Eliminates the need for bracket modifications in EL180 and ML180 series furnaces.
Common Questions:
- Why is my furnace showing a "Pressure Switch Open" code? This often indicates the inducer motor isn't pulling enough vacuum, the 80W57 diaphragm has failed, or there is a blockage in the 1/4" barb connection or flue pipe.
- Can I use a universal switch instead of the 80W57? While possible, universal switches often lack the exact -.65" WC set point, which can lead to unsafe operation or frequent ignition failures.
- Will this fix a furnace that starts then stops? If the inducer runs but the burners don't ignite, a failing SPST pressure switch is a primary suspect for the interrupted cycle.
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.
