For contractors dealing with closed-loop plumbing containing backflow preventers or check valves

The DFM series integrates two separate control cycles into one housing

preventing head pressure spikes and protecting the compressor from premature wear during high-ambient operations

While the 626611 limit switch can fail due to mechanical wear

Lochinvar & A.O. Smith 100267000 Inducer 340155-7024 For contractors dealing with closed-loopAs a veteran tech, you know that a failing draft inducer motor is often the culprit behind pressure switch errors and ignition failures in high efficiency systems. This genuine Lochinvar & A. O. Smith 100267000 Inducer is a direct OEM replacement designed specifically for KHN199, KHN285, and equivalent WH series Knight boilers. Operating on a standard 120V 60Hz electrical profile, this inducer fan assembly is engineered to maintain the precise