Trane MOT18978 1/2 HP 115V 4-Speed Blower Motor 1375 RPM

The Trane MOT18978 is a genuine OEM replacement blower motor engineered for reliable performance in residential and light commercial HVAC systems. This PSC (Permanent Split Capacitor) motor delivers 1/2 horsepower at 115 volts, 60 Hz single-phase power, operating at 1375 RPM with four selectable speed settings for flexible airflow control.

Technical Specifications:

• Frame Size: 48 frame with 0.5-inch shaft diameter and 3.5-inch shaft length
• Reversible rotation for versatile installation
• Sleeve bearing design for smooth, quiet operation
• Current Draw: 9.3 full load amps at 120V
• Design Torque: 51.5 oz-ft at 120V
• Maximum Operating Temperature: 158°F
• Wire Leads: 30 inches
• Requires 15 MFD capacitor at 370V (not included)

What's Included:

• (1) Blower Motor MOT18978
• (1) Resilient O-Ring Kit with 2 rings, 2.5-inch diameter (RNG02600)

This motor is manufactured by GE (Genteq) model 5KCP39KGN691AS and is compatible with both Trane and American Standard equipment. It replaces previous part numbers including MOT3019, MOT12767, 5KCP36KGN691AS, and X70670720020. The 4-speed functionality allows HVAC technicians to precisely match system airflow requirements for optimal comfort and efficiency.

Important Installation Note: Always inspect the blower wheel on your blower assembly, as bad or unbalanced wheels can cause premature motor failure due to vibration.