Lennox 73W19 Limit Switch 320788-702 Integrated Auxiliary Switch: One built-in

Integrated Auxiliary Switch: One built-in SPDT switch reduces the need for external relays and simplifies field wiring for status feedback

Why is my one-pipe thermostat failing to regulate branch pressure

the Carrier OEM pressure sensor provides real-time pressure feedback to the system controller

This OEM hot surface ignitor is cross-referenced with part numbers 9004534005 and IG10272

Double Mixing Function: Optimizes boiler return temperatures to reduce the risk of condensation and thermal shock in the heat exchanger

Lennox 73W19 Limit Switch 320788-702 Integrated Auxiliary Switch: One built-inThe Lennox 73W19 is a critical 155 30V OEM replacement limit switch engineered for precision temperature monitoring in high efficiency furnace applications. As a direct replacement for Lennox 102857 06, this high limit safety control is designed to break the electrical circuit if the heat exchanger temperatures exceed the 155 degree Fahrenheit threshold. This Lennox furnace limit switch prevents thermal stress on the heat exchanger and ensures the