Description
The Lennox 86H31 is a high pressure switch engineered specifically for R-410A refrigerant systems, featuring a manual reset (M/R) design that provides an added layer of system protection. When system pressure exceeds the set point, the switch opens the circuit and requires a deliberate manual reset before the equipment can restart — preventing repeated short-cycling and potential compressor damage.
Key Features
- Designed for use with R-410A (410#) refrigerant systems
- Manual reset (M/R) operation for enhanced system protection
- Opens circuit on high-pressure fault to prevent compressor damage
- Requires deliberate manual reset before system restart, reducing risk of repeated fault cycling
- Genuine Lennox OEM replacement part
- Direct drop-in replacement for compatible Lennox equipment
Why Manual Reset Matters
Unlike automatic-reset pressure switches, a manual reset switch demands technician intervention after a high-pressure trip. This ensures the root cause of the overpressure condition is identified and corrected before the system is returned to service — protecting the compressor, refrigerant circuit, and overall system integrity.
Application
- Lennox residential and light commercial HVAC systems using R-410A refrigerant
- Ideal for service and replacement in split systems, heat pumps, and packaged units
Product Details
- Brand: Lennox
- SKU / Part Number: 86H31
- Refrigerant Compatibility: R-410A
- Reset Type: Manual Reset (M/R)
- Switch Type: High Pressure Switch
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