Lennox 49L92 SPST Pressure Switch 0.58" WC

The Lennox 49L92 SPST Pressure Switch is a safety switch that is applied in Lennox HVAC systems. It operates as a pressure measuring device for pressure inside the system. This SPST switch is open circuit, and the circuit is off until the desired air pressure level is achieved. When that set pressure is attained, the switch makes the circuit and initiates actions like system shut off due to dangerous pressure. This device is essential in the safe and proper functioning of your Lennox HVAC system.