Lennox 17W14 Pressure Switch

The Lennox 17W14 Pressure Switch is a critical safety component designed for precise refrigerant pressure monitoring in high-performance HVAC systems. This 40/15# Low pressure switch serves as a reliable safeguard, engineered to open the electrical circuit when suction pressure falls below the 15 PSI cutout point and automatically resets when pressure rises back to the 40 PSI cut-in threshold. Built to handle the rigorous demands of Lennox commercial rooftop units and residential split systems, this switch prevents compressor damage caused by loss of charge or coil freeze-up. As an OEM Lennox replacement part, it ensures exact fitment and maintains the system's UL certification integrity. Utilizing a durable diaphragm and hermetically sealed contacts, the 17W14 provides long-term stability and resistance to vibration, making it a standard choice for technicians performing HVAC pressure switch troubleshooting or routine maintenance on R-410A systems.

Key Technical Benefits

• Automatic Reset Functionality: Eliminates manual intervention by restoring operation once system pressures stabilize within the 40/15 PSI range.
• Direct OEM Compatibility: Specifically engineered for seamless integration with Lennox HVAC equipment, ensuring proper terminal connections and mounting.
• System Protection: Acts as an essential low-pressure cutout to prevent oil migration issues and overheating in the compressor motor.
• Rugged Construction: Designed to withstand the thermal cycling and high-vibration environment of the condenser cabinet.

Common Contractor Questions

What are the specific trip points for the 17W14 switch?
This switch is calibrated for a 15 PSI cutout (falling) and a 40 PSI cut-in (rising) pressure differential.

Is this pressure switch compatible with R-410A systems?
Yes, the 17W14 is frequently utilized in modern R-410A applications as a primary safety control for monitoring low-side suction pressure.

Does this unit require a manual reset button?
No, this is an automatic reset switch that re-engages the contactor once the pressure reaches the specified 40 PSI 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.