Lennox 98G89 Draft Motor

The Lennox 98G89 Draft Motor is a high-performance direct drive blower motor designed for critical combustion air delivery in Lennox furnace systems. As an OEM replacement motor, this unit is technically identical to the Lennox 98G8901, ensuring a precise drop-in fit for existing 12M55 and 12M5501 inducer motor assemblies. Operating at 3200 RPM, this 1/25 HP motor utilizes a permanent split capacitor (PSC) design to maintain high static pressure within the flue, effectively exhausting combustion gases to prevent pressure switch lockout or incomplete combustion. The single-phase 208/230V power requirement and 0.7 Amp draw make it a standard choice for mid-efficiency and high-efficiency gas furnaces. Built with sealed ball bearings and an air-over (AO) enclosure, it supports continuous duty in high-ambient temperature conditions. For field technicians, the 5-inch center-to-center mounting and 5/16-inch diameter shaft ensure compatibility with Fasco 7121-7091 and Rotom FM-RFM890 applications without the need for extensive structural modifications.

• Universal Compatibility: Fully replaces 12M55 assemblies and 98G8901 models, supporting a wide range of GCS16 and commercial HVAC series.
• Industrial Build: Features class B insulation and sealed ball bearings to handle the thermal stress of flue gas induction.
• Consistent Static Pressure: Optimized 3200 RPM operation ensures the centrifugal switch or pressure sensor remains closed during the heating cycle.
• High-Efficiency Performance: Low 0.7 Amp draw minimizes electrical load while providing 1/25 horsepower for reliable draft inducer ventilation.

Common Questions

Is the 98G89 a direct replacement for the 98G8901?
Yes, the 98G89 is the current OEM part number and is technically identical to the 98G8901, serving as a primary component in the Lennox 12M55 inducer assembly.

Will this motor fix a furnace that starts and then shuts down?
If the inducer motor fails to reach the specified 3200 RPM, the pressure switch will not close, preventing the ignition sequence. Professional multimeter testing for 230V at the leads is recommended for diagnosis.

Does this unit include the cooling fan and shaft adapter?
This motor typically includes the internal cooling fan and features a 5/16-inch shaft designed specifically for Fasco and Lennox fan wheels used in combustion air blowers.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.