Lennox 38M78 - Low Ambient Switch (In 390, Out 250)
The Lennox 38M78 Low Ambient Switch is an essential component designed to safeguard HVAC systems operating in colder environments. With precise setpoints of 390 psi (cut-in) and 250 psi (cut-out), this pressure-activated switch helps maintain optimal system pressure, ensuring reliable compressor performance and preventing damage during low ambient temperature conditions.
Engineered specifically for Lennox systems, the 38M78 switch automatically cycles the condenser fan motor based on refrigerant pressure, regulating head pressure in response to falling outdoor temperatures. This function is critical for systems that must operate year-round, including commercial refrigeration, data center cooling, and residential units with cold-weather demand.
Key Features:
- Cut-In Pressure: 390 psi
- Cut-Out Pressure: 250 psi
- Application: Designed for low ambient control in air conditioning and refrigeration systems
- Function: Helps prevent compressor damage by maintaining optimal refrigerant pressure
- Compatibility: OEM replacement part for Lennox equipment
- Durability: Built to perform reliably in challenging outdoor conditions
Maintain system efficiency and reliability with the Lennox 38M78 Low Ambient Switch—engineered for precision control and dependable performance in demanding climates.
Available now at Beenimax.com – your trusted source for genuine Lennox replacement parts.