OEM Lennox ECM 3.0 Blower Motor Assembly — 33W13
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The genuine OEM Lennox 33W13 ECM 3.0 blower motor assembly drives conditioned air through your Lennox furnace or air handler. As a variable-speed electronically commutated motor, it precisely ramps airflow to match heating and cooling demand, delivering quiet operation, improved comfort, and higher efficiency than standard PSC motors. This complete assembly is a direct factory replacement matched to your Lennox system's airflow profile.
Common failure symptoms: A failing 33W13 motor may cause weak or no airflow, the blower failing to start, intermittent stopping, unusual humming or grinding noises, or blower fault codes on the control board. ECM control module failures can also produce erratic speed behavior or repeated resets during a heating or cooling cycle.
Why OEM matters: ECM 3.0 motors are programmed with specific airflow tables that pair with your Lennox control board and furnace tonnage. Generic replacements often lack the correct programming, connectors, or torque rating, leading to poor comfort and premature failure. The genuine Lennox 33W13 assembly ensures correct fit, factory programming, and rated performance for your equipment.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days