Lennox 10U40 HIGH PRESSURE SWITCH SPST 24V

The Lennox 10U40 is a single pole single throw (SPST) high pressure switch designed for HVAC systems operating at 24 volts. This safety control monitors refrigerant pressure and automatically shuts down the system when pressure exceeds safe operating limits, protecting the compressor and other critical components from damage.

Key Features:

• Pressure range: 490-675 PSI cut-out
• SPST (Single Pole Single Throw) configuration
• 24-volt operation for residential and light commercial systems
• Automatic reset design prevents system damage
• Direct replacement for Lennox OEM systems

This pressure switch is an essential safety component that prevents costly equipment damage by monitoring high-side refrigerant pressure. When pressure reaches the cut-out setpoint, the switch opens the circuit to stop compressor operation. Commonly used in air conditioning and heat pump applications, the 10U40 ensures reliable system protection and longevity.