What is the primary difference between the hub and foot mount options

replacing the entire gas burner assembly is often the most effective way to restore the FVIR system burner to its original performance standards

making it a standard drop-in replacement for many Carrier

The unit features an error-code display and can be programmed to de-energize relays upon sensing a thermistor short or open circuit to prevent system damage

this component continuously monitors the boiler’s water level and breaks the 24V control circuit to the burner if a low-water threshold is detected

Lennox 46K07 Limit Switch 322838-753 What is the primary differenceThe Lennox 46K07 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Engineered as a L185 20F fixed temperature control, this genuine Lennox replacement part ensures the burner circuit opens if internal plenum temperatures reach 185F, preventing heat exchanger damage and potential fire hazards. The switch is designed to automatically reset once temperatures drop by a 20F