standard grade-5 or higher bolts should be sourced separately based on the thickness of your specific mounting rail or base frame

not a residential programmable unit

Ensure the burner is clean and the ignitor is properly aligned with the gas flow

Verify your old motor's rotation to ensure compatibility with your current blower wheel pitch

Lennox 25M53 Fan Blade 328140-751 standard grade-5 or higher boltsThe Lennox 25M53 Fan Blade is a precision engineered OEM replacement part designed for high performance heat rejection in residential condensing units. This 24 inch 3 blade fan features a 29 degree pitch and a 1 2 inch bore, ensuring optimal static pressure management and airflow efficiency. Constructed with a hub on the discharge side, it is designed for CW facing discharge rotation, making it a direct match for specific Lennox HSXA15 and HSXA19