OEM Lennox ECM Blower Motor Assembly — 70W47
OEM Guaranteed
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30-Day Returns
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The genuine OEM Lennox 70W47 ECM blower motor assembly delivers the variable-speed, high-efficiency airflow your Lennox furnace or air handler was engineered for. Unlike a standard PSC motor, this electronically commutated motor precisely modulates speed to maintain consistent comfort, quieter operation, and lower energy consumption while matching the demand of your system.
Common failure symptoms: no airflow from the vents, a blower that won't ramp up or runs at a single speed, intermittent operation, unusual humming or clicking, or repeated tripping on a motor or communication fault. ECM modules are also vulnerable to power surges and moisture, which can disable the onboard controller.
Why OEM matters: ECM motors communicate directly with the Lennox control board and are programmed for a specific airflow profile. Aftermarket or mismatched motors can cause communication errors, incorrect CFM staging, and comfort problems. The OEM 70W47 assembly guarantees the correct programming, mounting, and connector fit — restoring efficient, whisper-quiet, factory-rated performance.
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