Lennox 67K30 Pressure Switch

The Lennox 67K30 Pressure Switch is a critical safety and operational component designed for negative pressure sensing in high-efficiency HVAC systems. This OEM Lennox replacement part features a factory-calibrated set point of .55" WC (Water Column) and utilizes a Single Pole Single Throw (SPST) switch configuration. Engineered for precise monitoring of the inducer blower motor's performance, it ensures the combustion process only initiates when proper integrated venting and airflow are established. The unit is equipped with a standard 1/4" barb connection for secure pneumatic tubing attachment and is identical to part number 67K3001. As a genuine Lennox 67K30 component, it maintains the exact electrical and physical specifications required for compatible furnace models, including the G23 series. Whether dealing with high-altitude adjustments or standard furnace pressure switch troubleshooting, this ruggedly constructed switch provides the reliability required for demanding residential and industrial environments.

Key Benefits:

• Precise Calibration: Fixed .55" WC set point ensures accurate pressure monitoring for optimal system safety.
• Direct Compatibility: Replaces legacy part numbers 18J35, 18J3501, and is a direct swap for the 67K3001.
• Professional Grade: Built with a 1/4" barb connection to prevent vacuum leaks and ensure a stable SPST signal.
• Versatile Application: Suitable for Lennox, Allied, Armstrong, and Ducane equipment requiring specific water column thresholds.

Common Questions:

Is the 67K30 interchangeable with the 67K3001?
Yes, the 67K30 and 67K3001 are technically identical components and share the same .55" WC specifications and SPST electrical configuration.

What are the symptoms of a failing Lennox pressure switch?
Common indicators include the furnace failing to ignite, the inducer motor running continuously without fire, or specific diagnostic flash codes on the control board signifying a "Pressure Switch Stuck Open" cabinet condition.

Can I use this switch in high-altitude applications?
While the .55" WC rating is standard for specific models, always verify your furnace’s rating plate or service manual, as high-altitude kits may require different pressure thresholds for safe operation.

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.