Lennox 51W15 Interlock Switch technicians should verify the manifold

technicians should verify the manifold and blower flange dimensions against the technical parts list for their specific BTU rating

or COAT models

the strainer body

Enhanced System Reliability: Specifically engineered to prevent leakage and maintain pressure differentials in potable water systems

Lennox 51W15 Interlock Switch technicians should verify the manifoldThe Lennox 51W15 Interlock Switch serves as a fundamental safety component within residential and commercial furnace and air handler cabinets. This genuine Lennox OEM part is engineered to break the electrical circuit to the blower motor and control board immediately upon the removal of the service panel. By maintaining positive contact when the door is secured, the 51W15 furnace door switch prevents accidental exposure to high voltage components and