Lennox 86H31 Pressure Switch

The Lennox 86H31 is a high-performance HVAC high pressure switch engineered as a critical safety component for R-410A refrigeration and air conditioning systems. This OEM Lennox replacement part, also identified by part number 86H3101, is designed to monitor high-side refrigerant levels and provide reliable system protection. When head pressure exceeds the factory-set 410 PSI limit, the switch actuates to shut down the compressor, preventing mechanical failure and ensuring operational safety in residential and light commercial units.

This manual reset pressure switch features an SPST Normally Closed (N.C.) contact configuration rated for 120 VAC 375VA pilot duty. It comes equipped with 55-inch leads for flexible installation across various Lennox packaged unit and split system models. As a direct replacement for legacy part numbers such as 79J06 and 79J0601, the 86H31 ensures seamless integration into existing Lennox RTU and heat pump configurations without compromising the integrity of the original design. This switch is vital for technicians performing scheduled maintenance or emergency repairs on high-pressure 410A systems.

• Precise Pressure Safety: Specifically calibrated to actuate at 410 PSI to protect the compressor from excessive head pressure.
• Manual Reset Feature: Enables technicians to diagnose the root cause of high-pressure trips before restarting the system.
• Universal Compatibility: Replaces older Lennox and Allied Air part numbers including 86H3101, 79J06, and 79J0601.
• Durable Construction: Built to withstand the environmental stresses of commercial rooftop applications and residential condensing units.
• Easy Wiring: Includes generous 55" lead lengths to accommodate diverse cabinet layouts and control board locations.

Is the 86H31 interchangeable with the 86H3101?
Yes, the 86H31 is technically identical to the 86H3101. Lennox frequently updates part numbers for inventory tracking, but the technical specifications and 410# pressure ratings remain the same.

Can this switch be used with refrigerants other than R-410A?
This switch is specifically rated for 410 PSI, which is optimized for the high-pressure characteristics of R-410A systems. Using it with lower-pressure refrigerants like R-22 may result in the safety trip not actuating when needed.

What is the contact rating for this Lennox pressure switch?
The switch is designed for pilot duty with a contact rating of 120 VAC at 375VA. It utilizes a Single Pole Single Throw (SPST) Normally Closed contact that opens upon reaching the high-pressure limit.

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.