Trane MOT18996 Motor

The Trane MOT18996 Motor is a high-performance 1/8 HP blower motor designed for precise airflow management in residential and light commercial air handling units. Operating on a standard 115V single-phase power supply, this 3-speed HVAC motor offers versatile performance with fixed operating points at 1080 RPM, 800 RPM, and 600 RPM. This multi-tap configuration allows technicians to fine-tune delta-T across the evaporator coil, ensuring the system meets specific static pressure requirements of the ductwork. Built with a 48 frame and Open Air Over (OAO) enclosure, this motor utilizes a resilient mounting system to significantly dampen harmonic vibrations and mechanical noise during high-torque startup and sustained operation.

Engineered as a direct replacement for MOT12231, the MOT18996 features a double shaft design (0.5-inch diameter) that accommodates various blower wheel and fan blade configurations. This genuine OEM Trane replacement motor is critical for restoring factory-spec air circulation and maintaining the electrical integrity of the control board. For optimal performance, always pair this motor with a compatible 7.5 MFD/370V run capacitor to ensure proper phase displacement and starting torque.

• Multi-Speed Versatility: Triple speed taps (1080/800/600 RPM) provide the flexibility needed to match original equipment airflow profiles.
• Durable Construction: The NEMA 48 frame with OAO enclosure is designed for maximum heat dissipation in the airstream.
• Vibration Isolation: Integrated resilient mounting rings reduce structure-borne noise, a common homeowner complaint after motor swaps.
• Reversible Rotation: Supports both CW and CCW rotation, making it a versatile "truck stock" item for various Trane and American Standard models.
• Dual Shaft Capability: Simplifies installation in specialized blower housings requiring double-ended drives.

What is the correct capacitor for the MOT18996?
This motor typically requires a 7.5 MFD / 370V AC run capacitor. Using an incorrectly rated capacitor can lead to winding overheating or failure to start under load.

Can this motor replace a single-speed 1/8 HP motor?
Yes, provided the frame size (48), voltage (115V), and shaft dimensions match. You would simply wire the highest speed tap or the tap that matches your system's CFM requirements and cap off the unused leads.

Why is my new motor humming but not spinning?
Technicians should first verify the run capacitor is within tolerance. If the capacitor is functional, check for mechanical binding in the blower wheel or verify that the 115V supply is reaching the correct speed tap and common wire.

This item is not eligible for free shipping.

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.