Tempstar Variable Speed Blower Motor Kit for T8MPT050B12A1 — 1/2 HP ECM | Ships Today

Overview

This OEM blower motor kit (part number 1173044) is the 1/2 HP variable speed (ECM) motor that drives the indoor blower in your Tempstar T8MPT050B12A1 furnace. The electronically commutated motor ramps airflow up and down for quieter operation, better humidity control, and higher efficiency than a standard PSC motor. As a complete kit ("MTR BLR KIT 1/2 HP VAR SPD"), it includes the motor and module needed for a direct OEM replacement. A failing ECM blower causes weak or no airflow, repeated starting and stopping, error codes, or a unit that runs the inducer but never moves air.

Specifications

Compatibility

Designed for the Tempstar T8MPT050B12A1 furnace and other ICP-family equipment (Tempstar, Heil, Comfortmaker) that uses OEM blower kit 1173044. Confirm horsepower, shaft, and module programming match your existing motor before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the blower compartment door and slide out the blower assembly.
3. Document — Photograph the motor wiring, module connector, and blower wheel position before disconnecting.
4. Remove — Disconnect the harness, loosen the wheel set screw, and separate the old motor from the housing.
5. Install — Transfer the blower wheel to the new motor, mount it in the housing, and reconnect the harness and module per your photo.
6. Test — Restore power and confirm the blower ramps up smoothly through heating and cooling speeds.

Signs You Need a Replacement

• Weak airflow or no air movement on a call for heat or cool
• Blower starts then stops repeatedly (ECM fault)
• Loud bearing noise, grinding, or wobble from the motor
• Control board reports a blower/motor communication error

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.