Lennox 38M64 Pressure Switch
The Lennox 38M64 Pressure Switch is a critical safety component designed for precise draft pressure monitoring in residential and commercial HVAC systems. This OEM Lennox furnace part is factory-calibrated to a set point of 1.95" WC (Water Column), providing the exact differential pressure required to verify inducer motor operation and flue gas venting. Engineered as a direct replacement for Lennox 38M6401, this component ensures your furnace or air handler maintains optimal combustion cycles without the nuisance tripping associated with lower-quality aftermarket alternatives.
For service technicians, the Lennox 38M64 features a standard 1/4" NPT connection and is built to withstand high-static conditions in high-efficiency heating units. Whether you are troubleshooting a Lennox 1.95" WC pressure switch failure or performing a seasonal bypass test, this switch offers the reliable SPST (Single Pole Single Throw) contact closure required for the ignition sequence. It is compatible with a wide range of Lennox, Armstrong, and Ducane models, including those requiring the IS2ATO1-6084 specification. Rely on this genuine HVAC pressure switch to maintain equipment uptime and meet strict UL and CSA safety standards in the field.
Key Benefits- Precise 1.95" WC Set Point: Ensures accurate sensing of the venter motor vacuum for safe ignition protocols.
- OEM Compatibility: Direct replacement for part numbers 38M64, 38M6401, and IS2ATO1-6084 across multiple brands like Lennox and Armstrong.
- Industrial Build Quality: Constructed with high-grade diaphragms to resist fatigue from frequent cycling and temperature fluctuations.
- Simplified Installation: Features standard 1/4 inch NPT port and spade terminals for rapid field replacement.
- Safety Certified: Fully UL and CSA approved to meet original equipment manufacturer specifications.
What are the symptoms of a failing Lennox 38M64 pressure switch?
Common signs include the inducer motor running without the burners igniting, "pressure switch stuck open" flash codes on the control board, or the system shutting down shortly after start-up due to a loss of vacuum signal.
Can I use a switch with a different "WC rating?
No. Using a switch with a rating other than 1.95" WC can lead to dangerous operating conditions or frequent system lockouts. Always match the manufacturer’s specified set point.
Is this switch compatible with Armstrong or Ducane furnaces?
Yes, as these brands are part of the Lennox family, the 38M64 is a standard replacement for many of those models requiring the same pressure threshold.
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: $34.20
-65%$34.20
$11.97Product Information
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Description
The Lennox 38M64 Pressure Switch is a critical safety component designed for precise draft pressure monitoring in residential and commercial HVAC systems. This OEM Lennox furnace part is factory-calibrated to a set point of 1.95" WC (Water Column), providing the exact differential pressure required to verify inducer motor operation and flue gas venting. Engineered as a direct replacement for Lennox 38M6401, this component ensures your furnace or air handler maintains optimal combustion cycles without the nuisance tripping associated with lower-quality aftermarket alternatives.
For service technicians, the Lennox 38M64 features a standard 1/4" NPT connection and is built to withstand high-static conditions in high-efficiency heating units. Whether you are troubleshooting a Lennox 1.95" WC pressure switch failure or performing a seasonal bypass test, this switch offers the reliable SPST (Single Pole Single Throw) contact closure required for the ignition sequence. It is compatible with a wide range of Lennox, Armstrong, and Ducane models, including those requiring the IS2ATO1-6084 specification. Rely on this genuine HVAC pressure switch to maintain equipment uptime and meet strict UL and CSA safety standards in the field.
Key Benefits- Precise 1.95" WC Set Point: Ensures accurate sensing of the venter motor vacuum for safe ignition protocols.
- OEM Compatibility: Direct replacement for part numbers 38M64, 38M6401, and IS2ATO1-6084 across multiple brands like Lennox and Armstrong.
- Industrial Build Quality: Constructed with high-grade diaphragms to resist fatigue from frequent cycling and temperature fluctuations.
- Simplified Installation: Features standard 1/4 inch NPT port and spade terminals for rapid field replacement.
- Safety Certified: Fully UL and CSA approved to meet original equipment manufacturer specifications.
What are the symptoms of a failing Lennox 38M64 pressure switch?
Common signs include the inducer motor running without the burners igniting, "pressure switch stuck open" flash codes on the control board, or the system shutting down shortly after start-up due to a loss of vacuum signal.
Can I use a switch with a different "WC rating?
No. Using a switch with a rating other than 1.95" WC can lead to dangerous operating conditions or frequent system lockouts. Always match the manufacturer’s specified set point.
Is this switch compatible with Armstrong or Ducane furnaces?
Yes, as these brands are part of the Lennox family, the 38M64 is a standard replacement for many of those models requiring the same pressure threshold.
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.
