OEM Lennox Draft Inducer Motor Assembly Kit — 33M70
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The genuine OEM Lennox 33M70 draft inducer motor assembly kit pulls combustion gases through the heat exchanger and safely expels them out the flue. Running before and during each heating cycle, the inducer establishes the negative pressure that closes the pressure switch and allows the burners to ignite. This complete kit includes the motor and mounting hardware for a direct factory replacement in your Lennox furnace.
Common failure symptoms: A failing 33M70 inducer commonly produces loud buzzing, humming, rattling, or high-pitched bearing noise at startup. You may also see the furnace lock out on a pressure switch fault, fail to ignite, short cycle, or not start at all when the inducer motor cannot reach speed or seizes entirely.
Why OEM matters: Draft inducers are matched to your Lennox furnace's venting design and combustion airflow requirements. An incorrect motor speed or wheel can disrupt the pressure switch operation and create unsafe venting conditions. The genuine Lennox 33M70 kit ensures the correct RPM, wheel, and mounting for safe, reliable operation of 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
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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