The Lennox 38M76 is an OEM low pressure switch engineered to protect refrigerant circuits in Lennox HVAC systems. With a closing setpoint of 90 PSI and an opening setpoint of 40 PSI, this switch monitors system pressure and interrupts operation when low-side pressure falls outside safe operating parameters — helping prevent compressor damage and refrigerant-related failures.
Key Features
- OEM Lennox replacement low pressure switch
- Close setpoint: 90 PSI
- Open setpoint: 40 PSI
- Designed to protect the compressor from low refrigerant pressure conditions
- Direct OEM replacement for compatible Lennox equipment
- Ensures reliable, automatic pressure-based circuit protection
Application
The 38M76 low pressure switch is a direct OEM replacement part for select Lennox air conditioning and heat pump systems. It is installed in the low-pressure side of the refrigerant circuit and opens the control circuit when pressure drops to the 40 PSI threshold, protecting the compressor from operating under unsafe low-pressure conditions. The switch automatically resets (closes) once pressure recovers to 90 PSI, restoring normal system operation.
Why Choose the Lennox 38M76?
- Genuine Lennox OEM part — ensures proper fit and function
- Precise pressure setpoints for reliable compressor protection
- Helps extend equipment life by preventing low-refrigerant operation
- Easy drop-in replacement for qualified HVAC technicians
