Lennox 56M04 Pressure Switch
Ensure your combustion system operates within precise safety parameters with the Lennox 56M04 Pressure Switch. This genuine OEM .55" WC pressure switch is a critical safety component designed to monitor the draft inducer motor's performance, ensuring the flue remains clear and the vacuum pressure is sufficient for a safe ignition sequence. Engineered for high-efficiency Lennox gas furnaces and air handlers, this switch features a single-pole single-throw (SPST) configuration that opens or closes based on the 0.55-inch water column set point. HVAC technicians rely on the 56M04 for its durable brass NPT connections and rugged housing, which withstand the thermal cycling typical of intensive commercial and residential heating applications. When troubleshooting a furnace pressure switch failure or a system that trips on limit codes, this Lennox replacement part (also identified as 56M0401) provides the exact calibration required to prevent hazardous rollout conditions or improper combustion. Its compatibility extends across various Armstrong and Ducane models, making it a versatile staple for truck stock.
Key Benefits:- Precise Calibration: Factory-set at .55" water column to ensure the inducer motor maintains the correct venting vacuum before allowing the gas valve to energize.
- OEM Reliability: Genuine Lennox 56M04 construction eliminates the risk of "nuisance trips" often associated with universal aftermarket switches.
- Enhanced Safety: Acts as a primary fail-safe, preventing furnace operation if a blockage is detected in the flue or heat exchanger.
- Universal HVAC Compatibility: Fits a broad range of Lennox, Armstrong, and Ducane units, simplifying inventory for service contractors.
- How do I know if my Lennox pressure switch is bad? If your furnace inducer motor starts but the igniter fails to glow, or if you see a specific LED fault code for a "pressure switch stuck open," the 56M04 may be failing or detecting a venting issue.
- Can I use a universal switch instead of the 56M04? While universal kits exist, using the OEM Lennox 1411356 ensures the pressure set point is exactly .55" WC, maintaining the original safety certification of the equipment.
- Does this include the tubing? This part is the switch assembly itself. Technicians should inspect existing red or black silicone tubing for cracks or moisture during 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.
Original: $27.10
-65%$27.10
$9.48Lennox 56M04 Pressure Switch
Ensure your combustion system operates within precise safety parameters with the Lennox 56M04 Pressure Switch. This genuine OEM .55" WC pressure switch is a critical safety component designed to monitor the draft inducer motor's performance, ensuring the flue remains clear and the vacuum pressure is sufficient for a safe ignition sequence. Engineered for high-efficiency Lennox gas furnaces and air handlers, this switch features a single-pole single-throw (SPST) configuration that opens or closes based on the 0.55-inch water column set point. HVAC technicians rely on the 56M04 for its durable brass NPT connections and rugged housing, which withstand the thermal cycling typical of intensive commercial and residential heating applications. When troubleshooting a furnace pressure switch failure or a system that trips on limit codes, this Lennox replacement part (also identified as 56M0401) provides the exact calibration required to prevent hazardous rollout conditions or improper combustion. Its compatibility extends across various Armstrong and Ducane models, making it a versatile staple for truck stock.
Key Benefits:- Precise Calibration: Factory-set at .55" water column to ensure the inducer motor maintains the correct venting vacuum before allowing the gas valve to energize.
- OEM Reliability: Genuine Lennox 56M04 construction eliminates the risk of "nuisance trips" often associated with universal aftermarket switches.
- Enhanced Safety: Acts as a primary fail-safe, preventing furnace operation if a blockage is detected in the flue or heat exchanger.
- Universal HVAC Compatibility: Fits a broad range of Lennox, Armstrong, and Ducane units, simplifying inventory for service contractors.
- How do I know if my Lennox pressure switch is bad? If your furnace inducer motor starts but the igniter fails to glow, or if you see a specific LED fault code for a "pressure switch stuck open," the 56M04 may be failing or detecting a venting issue.
- Can I use a universal switch instead of the 56M04? While universal kits exist, using the OEM Lennox 1411356 ensures the pressure set point is exactly .55" WC, maintaining the original safety certification of the equipment.
- Does this include the tubing? This part is the switch assembly itself. Technicians should inspect existing red or black silicone tubing for cracks or moisture during 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
Ensure your combustion system operates within precise safety parameters with the Lennox 56M04 Pressure Switch. This genuine OEM .55" WC pressure switch is a critical safety component designed to monitor the draft inducer motor's performance, ensuring the flue remains clear and the vacuum pressure is sufficient for a safe ignition sequence. Engineered for high-efficiency Lennox gas furnaces and air handlers, this switch features a single-pole single-throw (SPST) configuration that opens or closes based on the 0.55-inch water column set point. HVAC technicians rely on the 56M04 for its durable brass NPT connections and rugged housing, which withstand the thermal cycling typical of intensive commercial and residential heating applications. When troubleshooting a furnace pressure switch failure or a system that trips on limit codes, this Lennox replacement part (also identified as 56M0401) provides the exact calibration required to prevent hazardous rollout conditions or improper combustion. Its compatibility extends across various Armstrong and Ducane models, making it a versatile staple for truck stock.
Key Benefits:- Precise Calibration: Factory-set at .55" water column to ensure the inducer motor maintains the correct venting vacuum before allowing the gas valve to energize.
- OEM Reliability: Genuine Lennox 56M04 construction eliminates the risk of "nuisance trips" often associated with universal aftermarket switches.
- Enhanced Safety: Acts as a primary fail-safe, preventing furnace operation if a blockage is detected in the flue or heat exchanger.
- Universal HVAC Compatibility: Fits a broad range of Lennox, Armstrong, and Ducane units, simplifying inventory for service contractors.
- How do I know if my Lennox pressure switch is bad? If your furnace inducer motor starts but the igniter fails to glow, or if you see a specific LED fault code for a "pressure switch stuck open," the 56M04 may be failing or detecting a venting issue.
- Can I use a universal switch instead of the 56M04? While universal kits exist, using the OEM Lennox 1411356 ensures the pressure set point is exactly .55" WC, maintaining the original safety certification of the equipment.
- Does this include the tubing? This part is the switch assembly itself. Technicians should inspect existing red or black silicone tubing for cracks or moisture during 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.
