Lennox 36W49 Pressure Switch
The Lennox 36W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the negative pressure generated by the inducer motor. This SPST furnace pressure switch is factory-calibrated to a 0.55" WC set point, ensuring the combustion process only initiates when proper venting and drafting are established. Constructed with a durable diaphragm and high-grade electrical contacts, this direct replacement pressure switch prevents the burner from firing under obstructed flue conditions or inducer failure. Industry cross-references include Lennox part number 65324900 and Honeywell IS20435-6112. When diagnosing furnace pressure switch stuck open codes, verify the draft inducer's performance and ensure the vacuum tubing is clear before replacing. This HVAC combustion safety switch ensures reliable operation in high-efficiency heating systems by maintaining strict tolerances for air pressure differentials, crucial for preventing carbon monoxide buildup and maintaining equipment longevity in residential applications.
Technical Features and Benefits- O.E.M. Specification: Precision-calibrated to 0.55" WC (Water Column) specifically for Lennox-branded air handlers and furnaces.
- Enhanced Reliability: Heavy-duty internal diaphragm resists fatigue, ensuring accurate switching cycles over the life of the HVAC unit.
- Direct Compatibility: Replaces Lennox 36W49 and LB-65324G, reducing installation time for service contractors.
- Safety Compliance: Designed to meet rigorous safety standards for forced-air combustion systems.
- Snap-Action Contacts: Provides clean electrical engagement to prevent arcing and ensure stable signal transmission to the control board.
What are the symptoms of a failing Lennox 36W49 pressure switch?
Common indicators include a furnace that cycles but fails to ignite, specific LED blink codes on the control board indicating a "pressure switch open" error, or the inducer running continuously without the gas valve opening.
Can I use a universal pressure switch instead of the 36W49?
While universal kits exist, utilizing the 36W49 O.E.M. replacement is recommended to ensure the 0.55" WC set point is exact, maintaining the original safety parameters and venting calculations of the furnace.
Is the 65324900 model compatible with high-altitude kits?
This specific switch is calibrated for standard altitudes. If you are servicing a unit at high elevation, consult the manufacturer's venting tables to confirm if a different pressure differential set point is required for that specific installation.
This item is not eligible for free shipping.
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.
Lennox 36W49 Pressure Switch
The Lennox 36W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the negative pressure generated by the inducer motor. This SPST furnace pressure switch is factory-calibrated to a 0.55" WC set point, ensuring the combustion process only initiates when proper venting and drafting are established. Constructed with a durable diaphragm and high-grade electrical contacts, this direct replacement pressure switch prevents the burner from firing under obstructed flue conditions or inducer failure. Industry cross-references include Lennox part number 65324900 and Honeywell IS20435-6112. When diagnosing furnace pressure switch stuck open codes, verify the draft inducer's performance and ensure the vacuum tubing is clear before replacing. This HVAC combustion safety switch ensures reliable operation in high-efficiency heating systems by maintaining strict tolerances for air pressure differentials, crucial for preventing carbon monoxide buildup and maintaining equipment longevity in residential applications.
Technical Features and Benefits- O.E.M. Specification: Precision-calibrated to 0.55" WC (Water Column) specifically for Lennox-branded air handlers and furnaces.
- Enhanced Reliability: Heavy-duty internal diaphragm resists fatigue, ensuring accurate switching cycles over the life of the HVAC unit.
- Direct Compatibility: Replaces Lennox 36W49 and LB-65324G, reducing installation time for service contractors.
- Safety Compliance: Designed to meet rigorous safety standards for forced-air combustion systems.
- Snap-Action Contacts: Provides clean electrical engagement to prevent arcing and ensure stable signal transmission to the control board.
What are the symptoms of a failing Lennox 36W49 pressure switch?
Common indicators include a furnace that cycles but fails to ignite, specific LED blink codes on the control board indicating a "pressure switch open" error, or the inducer running continuously without the gas valve opening.
Can I use a universal pressure switch instead of the 36W49?
While universal kits exist, utilizing the 36W49 O.E.M. replacement is recommended to ensure the 0.55" WC set point is exact, maintaining the original safety parameters and venting calculations of the furnace.
Is the 65324900 model compatible with high-altitude kits?
This specific switch is calibrated for standard altitudes. If you are servicing a unit at high elevation, consult the manufacturer's venting tables to confirm if a different pressure differential set point is required for that specific installation.
This item is not eligible for free shipping.
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 36W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the negative pressure generated by the inducer motor. This SPST furnace pressure switch is factory-calibrated to a 0.55" WC set point, ensuring the combustion process only initiates when proper venting and drafting are established. Constructed with a durable diaphragm and high-grade electrical contacts, this direct replacement pressure switch prevents the burner from firing under obstructed flue conditions or inducer failure. Industry cross-references include Lennox part number 65324900 and Honeywell IS20435-6112. When diagnosing furnace pressure switch stuck open codes, verify the draft inducer's performance and ensure the vacuum tubing is clear before replacing. This HVAC combustion safety switch ensures reliable operation in high-efficiency heating systems by maintaining strict tolerances for air pressure differentials, crucial for preventing carbon monoxide buildup and maintaining equipment longevity in residential applications.
Technical Features and Benefits- O.E.M. Specification: Precision-calibrated to 0.55" WC (Water Column) specifically for Lennox-branded air handlers and furnaces.
- Enhanced Reliability: Heavy-duty internal diaphragm resists fatigue, ensuring accurate switching cycles over the life of the HVAC unit.
- Direct Compatibility: Replaces Lennox 36W49 and LB-65324G, reducing installation time for service contractors.
- Safety Compliance: Designed to meet rigorous safety standards for forced-air combustion systems.
- Snap-Action Contacts: Provides clean electrical engagement to prevent arcing and ensure stable signal transmission to the control board.
What are the symptoms of a failing Lennox 36W49 pressure switch?
Common indicators include a furnace that cycles but fails to ignite, specific LED blink codes on the control board indicating a "pressure switch open" error, or the inducer running continuously without the gas valve opening.
Can I use a universal pressure switch instead of the 36W49?
While universal kits exist, utilizing the 36W49 O.E.M. replacement is recommended to ensure the 0.55" WC set point is exact, maintaining the original safety parameters and venting calculations of the furnace.
Is the 65324900 model compatible with high-altitude kits?
This specific switch is calibrated for standard altitudes. If you are servicing a unit at high elevation, consult the manufacturer's venting tables to confirm if a different pressure differential set point is required for that specific installation.
This item is not eligible for free shipping.
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.
