Lennox 18M62 Pressure Switch
The Lennox 18M62 Pressure Switch is a critical dual-stage furnace component designed for precise combustion air proving in high-efficiency heating systems. As an OEM Lennox replacement part, this switch is factory-calibrated to monitor the static pressure produced by the inducer motor, ensuring the system only proceeds to ignition when proper venting is established. This 2-stage pressure switch features a dual-level actuation point—typically set at 0.20" / 0.50" WC—to manage both low-fire and high-fire operational modes. Its SPST (Single Pole Single Throw) configuration provides reliable electrical continuity for the furnace control board, preventing short cycling or no-heat calls caused by faulty draft pressure readings.
For contractors servicing Lennox G60 and G60UHV series units, the 18M62 offers a direct-fit solution that eliminates the need for field adjustments. The surface-mount design and push-button reset capability ensure a secure installation within the furnace cabinet. This inducer limit switch is engineered to withstand the thermal stress of residential and industrial gas furnace environments, maintaining accuracy across its operational lifespan. Using genuine Lennox HVAC parts like the 18M62 preserves the original equipment's sequence of operation and safety certifications.
Key Benefits- Precise 2-Stage Calibration: Pre-set for 0.20" and 0.50" water column to ensure accurate airflow verification across multiple heating stages.
- OEM Compatibility: Designed specifically for Lennox G60 and G60UHV gas furnaces to ensure seamless integration with the existing control logic.
- Enhanced System Safety: Functions as a primary safety interlock, preventing gas valve opening if the inducer draft is insufficient.
- Robust Construction: Built by Resideo/Honeywell (BA20114) to high-grade industrial standards for long-term reliability in varying temperatures.
What are the symptoms of a failing Lennox 18M62 switch?
Common indicators include the furnace inducer motor running without ignition, the control board flashing a pressure switch stuck open code, or the system failing to transition into high-stage heating.
Can I use a universal pressure switch to replace the 18M62?
Technicians strongly advise against it. The Lennox 18M62 is a dual-stage switch with specific WC settings; using a single-stage or improperly calibrated universal part can lead to unsafe operation or system lockout.
Does this switch include the sensing tubing?
This part typically includes the pressure switch assembly itself. It is recommended to inspect and clear the existing silicone pressure tubing and collector box ports during installation to ensure accurate sensing.
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: $144.33
-65%$144.33
$50.52Lennox 18M62 Pressure Switch
The Lennox 18M62 Pressure Switch is a critical dual-stage furnace component designed for precise combustion air proving in high-efficiency heating systems. As an OEM Lennox replacement part, this switch is factory-calibrated to monitor the static pressure produced by the inducer motor, ensuring the system only proceeds to ignition when proper venting is established. This 2-stage pressure switch features a dual-level actuation point—typically set at 0.20" / 0.50" WC—to manage both low-fire and high-fire operational modes. Its SPST (Single Pole Single Throw) configuration provides reliable electrical continuity for the furnace control board, preventing short cycling or no-heat calls caused by faulty draft pressure readings.
For contractors servicing Lennox G60 and G60UHV series units, the 18M62 offers a direct-fit solution that eliminates the need for field adjustments. The surface-mount design and push-button reset capability ensure a secure installation within the furnace cabinet. This inducer limit switch is engineered to withstand the thermal stress of residential and industrial gas furnace environments, maintaining accuracy across its operational lifespan. Using genuine Lennox HVAC parts like the 18M62 preserves the original equipment's sequence of operation and safety certifications.
Key Benefits- Precise 2-Stage Calibration: Pre-set for 0.20" and 0.50" water column to ensure accurate airflow verification across multiple heating stages.
- OEM Compatibility: Designed specifically for Lennox G60 and G60UHV gas furnaces to ensure seamless integration with the existing control logic.
- Enhanced System Safety: Functions as a primary safety interlock, preventing gas valve opening if the inducer draft is insufficient.
- Robust Construction: Built by Resideo/Honeywell (BA20114) to high-grade industrial standards for long-term reliability in varying temperatures.
What are the symptoms of a failing Lennox 18M62 switch?
Common indicators include the furnace inducer motor running without ignition, the control board flashing a pressure switch stuck open code, or the system failing to transition into high-stage heating.
Can I use a universal pressure switch to replace the 18M62?
Technicians strongly advise against it. The Lennox 18M62 is a dual-stage switch with specific WC settings; using a single-stage or improperly calibrated universal part can lead to unsafe operation or system lockout.
Does this switch include the sensing tubing?
This part typically includes the pressure switch assembly itself. It is recommended to inspect and clear the existing silicone pressure tubing and collector box ports during installation to ensure accurate sensing.
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 18M62 Pressure Switch is a critical dual-stage furnace component designed for precise combustion air proving in high-efficiency heating systems. As an OEM Lennox replacement part, this switch is factory-calibrated to monitor the static pressure produced by the inducer motor, ensuring the system only proceeds to ignition when proper venting is established. This 2-stage pressure switch features a dual-level actuation point—typically set at 0.20" / 0.50" WC—to manage both low-fire and high-fire operational modes. Its SPST (Single Pole Single Throw) configuration provides reliable electrical continuity for the furnace control board, preventing short cycling or no-heat calls caused by faulty draft pressure readings.
For contractors servicing Lennox G60 and G60UHV series units, the 18M62 offers a direct-fit solution that eliminates the need for field adjustments. The surface-mount design and push-button reset capability ensure a secure installation within the furnace cabinet. This inducer limit switch is engineered to withstand the thermal stress of residential and industrial gas furnace environments, maintaining accuracy across its operational lifespan. Using genuine Lennox HVAC parts like the 18M62 preserves the original equipment's sequence of operation and safety certifications.
Key Benefits- Precise 2-Stage Calibration: Pre-set for 0.20" and 0.50" water column to ensure accurate airflow verification across multiple heating stages.
- OEM Compatibility: Designed specifically for Lennox G60 and G60UHV gas furnaces to ensure seamless integration with the existing control logic.
- Enhanced System Safety: Functions as a primary safety interlock, preventing gas valve opening if the inducer draft is insufficient.
- Robust Construction: Built by Resideo/Honeywell (BA20114) to high-grade industrial standards for long-term reliability in varying temperatures.
What are the symptoms of a failing Lennox 18M62 switch?
Common indicators include the furnace inducer motor running without ignition, the control board flashing a pressure switch stuck open code, or the system failing to transition into high-stage heating.
Can I use a universal pressure switch to replace the 18M62?
Technicians strongly advise against it. The Lennox 18M62 is a dual-stage switch with specific WC settings; using a single-stage or improperly calibrated universal part can lead to unsafe operation or system lockout.
Does this switch include the sensing tubing?
This part typically includes the pressure switch assembly itself. It is recommended to inspect and clear the existing silicone pressure tubing and collector box ports during installation to ensure accurate sensing.
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.
