Here is a guide to replace your blower motor!

⚠️ Safety First

• Turn off power at the thermostat and the breaker.

• Verify the unit has no power—use a non-contact voltage tester if possible.

• Blower motors can be sharp and heavy; be careful when pulling them out.

Tools You’ll Need

• Screwdrivers (Phillips & flathead)

• Nut driver set (1/4”, 5/16”, 3/8”)

• Adjustable wrench or socket set

• Needle-nose pliers

• New blower motor (correct HP, RPM, voltage, rotation, shaft size)

• New capacitor (matching microfarads for the new motor)

• Marker or tape (to label wires)

Step-By-Step Replacement Guide

1. Shut Off All Power

• Turn off the breaker labeled furnace or air handler.

• Remove the furnace panel.

2. Remove the Blower Assembly

1. Locate the blower housing—usually at the bottom of the furnace.

2. Disconnect the wiring harness going to the blower motor.

3. Remove the screws holding the blower housing in place.

4. Slide the entire assembly out.

3. Remove the Old Motor

1. Loosen or remove the set screw on the blower wheel hub.

2. Slide the motor/shaft out of the blower wheel. If stuck, use penetrating oil and gently tap the shaft.

3. Remove the motor mounting brackets from the old motor.

4. Install the New Motor

1. Make sure the rotation direction matches (CW or CCW). Some motors are reversable

2. Install the motor mounting brackets on the new motor.

3. Slide the motor shaft into the blower wheel, align it, and tighten the set screw.
   

   • The shaft should sit flush or slightly past the hub (not too far).

5. Install the New Capacitor

Important:

Every new motor needs a new matching capacitor.

• Mount the capacitor securely.

• Do NOT reuse the old capacitor unless it’s the exact rating for the new motor.

6. Wiring the Motor

Match wire-for-wire using your labels OR the motor wiring diagram.

Typical wires:

• Black = High speed (cooling)

• Blue/Yellow = Med speed (heat)

• White = Neutral

• Brown & Brown/White = Capacitor wires

Always follow the diagram on the motor.

7. Reinstall the Blower Assembly

• Slide it back into the furnace.

• Tighten all screws.

• Reconnect the main wiring harness.

8. Power Up & Test

Turn the breaker back on.

Set thermostat to COOL and FAN ON.

Check for:

• Smooth starting

• No scraping noises

• Strong airflow

• No vibrations

Let it run for a few minutes.