Trane American Standard MOT18958 OEM Blower Motor

The Trane American Standard MOT18958 Blower Motor is an OEM replacement motor designed for compatible Trane and American Standard heating and cooling equipment.

Featuring 1/2 horsepower, 1000 RPM, three selectable speeds, and 200–230V single-phase operation, the MOT18958 is designed to power compatible HVAC blower assemblies and maintain proper indoor airflow.

For homeowners, the blower motor is the component that spins the blower wheel, circulating heated or cooled air throughout the home. A properly operating blower motor helps maintain comfortable indoor temperatures and supports efficient HVAC system operation.

The Trane MOT18958 features a three-speed configuration that allows qualified HVAC technicians to select the appropriate airflow setting according to the equipment manufacturer's specifications.

This motor is also distributor-listed as a replacement for Trane MOT11863. Replacement compatibility should be verified using the complete HVAC equipment model and serial number before ordering.

Key Features & Function

• Brand: Trane / American Standard
• Manufacturer Part Number: MOT18958
• Product Type: HVAC Blower Motor
• Horsepower: 1/2 HP
• Operating Voltage: 200–230 VAC
• Electrical Phase: Single Phase
• Frequency: 60 Hz
• Rated Speed: 1000 RPM
• Speed Configuration: 3-Speed
• Rotation: CW / CCW, configuration-dependent
• Shaft Diameter: 1/2 inch
• Shaft Length: 3.5 inches
• Suggested Run Capacitor: 15 MFD / 370 VAC
• Replacement Reference: MOT11863 (distributor-listed)
• Designed for compatible Trane and American Standard HVAC equipment

HVAC Depot Pro Tip

A blower motor that hums, overheats, runs intermittently, or fails to start may have a faulty run capacitor, damaged bearings, incorrect supply voltage, or another electrical problem.

Before replacing the Trane MOT18958, a qualified HVAC technician should inspect the following components:

• Incoming 200–230 VAC electrical supply
• Motor run capacitor and capacitance rating
• Blower wheel condition and alignment
• Motor shaft and bearings
• Motor wiring and speed-selection connections
• Motor rotation and operating amperage
• Air filter and ductwork restrictions
• Equipment airflow requirements

HVAC Depot Pro Tip: The MOT18958 features three selectable motor speeds. Correct speed selection is important for maintaining proper heating and cooling airflow. Incorrect speed selection can affect indoor comfort, furnace temperature rise, and overall system performance.

Important Safety Warning: Disconnect electrical power before servicing HVAC equipment. Capacitors may retain a hazardous electrical charge after power is removed. Installation should be performed by a qualified HVAC technician.

Equipment / Model Compatibility

The Trane MOT18958 is designed for select Trane and American Standard HVAC equipment requiring this OEM blower motor.

Distributor replacement information identifies MOT18958 as a replacement for MOT11863. However, exact compatible furnace and air-handler models have not been independently verified.

Before purchasing, confirm:

• Complete HVAC equipment model number
• Equipment serial number
• Original blower motor part number
• Required 1/2 HP motor rating
• 200–230 VAC operating voltage
• 1000 RPM rated speed
• Three-speed wiring configuration
• Motor rotation requirements
• Shaft diameter and length
• Motor mounting configuration
• Required run capacitor rating

Compatibility Notice: MOT18958 is not a universal blower motor. Matching horsepower and voltage alone does not guarantee compatibility. Always verify the manufacturer-approved replacement before ordering.