reducing call-backs and troubleshooting time

always verify your model number and serial number against the HVAC technical specifications to ensure the orifice sizing matches your unit's BTU rating

the 8220 series minimizes pressure drop while maximizing flow capacity

This specific model is typically supplied as the coil only

shutting down the burner or heating element

Lennox 73W19 Limit Switch 320734-701 reducing call-backs and troubleshooting timeThe 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