Westinghouse 621831 Indoor Air Handler Motor 1/2 Hp

Product Description

The WESTINGHOUSE 621831 is a 1/2 HP, 3-speed replacement motor designed for indoor air handler units. Rated at 230 VAC, 60 Hz, this motor drives the blower assembly in residential and light-commercial air handler systems. It delivers consistent airflow across three speed settings, allowing technicians to match blower performance to system design requirements. HVAC service technicians and installers work with this type of component during routine motor replacements or system refurbishments where the original motor has failed or degraded beyond acceptable performance thresholds.

This motor is intended for use in indoor air handler applications, specifically where a 1/2 HP, multi-speed PSC-style blower motor is required. It is rated for 230 VAC, 60 Hz single-phase power, making it suitable for standard residential electrical supply configurations. The 3-speed winding configuration allows adjustment of blower CFM output at the terminal board to suit heating, cooling, or continuous fan operation modes depending on system commissioning requirements.

Key Features

• 1/2 HP output for reliable blower drive in residential air handler applications
• 3-speed winding configuration for flexible airflow adjustment during commissioning
• 230 VAC, 60 Hz single-phase rating matches standard residential power supply
• Direct OEM-style replacement for GB3BM-048K-BB and GB3BV-048K-BB air handlers

Compatibility

Designed as a direct replacement motor for the GB3BM-048K-BB and GB3BV-048K-BB indoor air handler models in the GB3BM and GB3BV series.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all electrical power to the air handler before removing the existing motor or making any wiring connections. Verify that the replacement motor shaft diameter, rotation direction, and mounting configuration match the original before completing the installation. Follow applicable NEC requirements for low-voltage and line-voltage wiring within the air handler cabinet.

Technical Specifications

• Horsepower: 1/2 HP
• Voltage: 230 VAC
• Frequency: 60 Hz
• Speeds: 3-Speed
• Application: Indoor Air Handler
• Compatible Part Numbers: GB3BM-048K-BB, GB3BV-048K-BB

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 621831