Description
Lennox 44A97 R-410A Manual Reset High Pressure Switch
The Lennox 44A97 is an OEM high pressure switch engineered specifically for R-410A refrigerant systems. Designed as a manual reset (M/R) safety device, this switch monitors refrigerant-side pressure and interrupts system operation when unsafe high-pressure conditions are detected — protecting the compressor, refrigerant circuit, and connected components from costly damage.
Key Features
- OEM Lennox replacement part — ensures proper fit and reliable performance
- Designed for R-410A (410#) refrigerant systems
- Manual reset operation — requires deliberate technician reset after a high-pressure trip event
- Protects compressor and refrigeration circuit from high-pressure damage
- Direct OEM replacement for compatible Lennox equipment
Why Manual Reset?
Unlike automatic reset switches, a manual reset high pressure switch requires a technician to physically reset the device after it trips. This design prevents the system from repeatedly cycling through a fault condition, ensuring that the root cause of the pressure event is identified and corrected before the equipment is returned to service — a critical safety feature for long-term system reliability.
Application
- Compatible with Lennox residential and light commercial HVAC systems using R-410A refrigerant
- Ideal for service replacement on units requiring OEM-specified high pressure safety controls
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