Aircon Indoor Unit Fan Motor

Aircon Fan Motor Replacement Guide & Repair Cost

Updated - Fri, 20 Dec 2024

What is an aircon fan motor?

An indoor aircon unit, commonly found in split-type air conditioning systems, contains a fan motor that plays a crucial role in the operation of the system. Here are some of the functions of the indoor aircon unit fan motor:

1. Air Circulation

The indoor fan motor helps to circulate the conditioned air within the room. When the air conditioning is switched on, the fan motor rotates the fan blades, which draw in air from the room and pass it over the evaporator coils. As the air get cold, it is then released back to the room to provide the cooling effect.

2. Temperature Regulation

The fan motor helps maintain a consistent temperature throughout the room by ensuring that the cooled air is evenly distributed. This prevents hot spots and cold spots within the space.

3. Air Filtration

Many indoor aircon units are equipped with air filters that help remove dust, allergens, and particles from the air. The fan motor assists in pulling air through these filters, enhancing indoor air quality.

4. Humidity Control

In addition to cooling the air, the evaporator coils can also remove moisture, helping to control indoor humidity levels. The fan motor aids in the dehumidification process by blowing air over the coils.

4. Quiet Operation

Modern indoor aircon units are designed for quiet operation. The fan motor is engineered to operate as quietly as possible to avoid causing disruptions in the living or working environment.

How to replace indoor aircon unit fan motor (DIY)?

Replacing an indoor air conditioning fan motor is a complex task and typically requires technical knowledge and experience with air conditioning systems. Hiring a professional is highly recommended if you are not familiar with ac systems or electrical work. Improper handling of the process can cause further damage and safety risks. Here's a general outline of the steps involved in replacing an indoor aircon unit's fan motor:

Note: This is a general guide and may not cover all specific models. Refer to your unit's manual and follow manufacturer guidelines.

Tools and Materials Needed:

Replacement fan motor
Screwdrivers
Pliers
Wrenches
Multimeter
Electrical tape
Wire connectors

Replacement Steps:

1. Safety Precautions

Ensure the power to the aircon unit is turned off. This involves both the electrical circuit breaker and the unit's power switch.
Verify that the unit is completely disconnected from electrical sources to prevent accidents.

2. Accessing the Fan Motor:

Open the indoor unit's access panel. This may involve removing screws or clips that secure the panel.

3. Disconnecting Wires:

Take a photo or make notes of the wiring connections to the fan motor. This will help during reinstallation.
Carefully disconnect the wires from the old fan motor using the appropriate tools.

4. Removing the Old Fan Motor

Loosen and remove any mounting screws or brackets holding the fan motor in place.
Gently slide out the old fan motor from its housing.

5. Installing the New Fan Motor:

Slide the new fan motor into the housing, aligning it properly.
Secure the motor in place using mounting screws or brackets.

6. Wiring the New Fan Motor

Connect the wires to the new fan motor according to the notes or photos you took earlier.
Use wire connectors and electrical tape to ensure secure and proper connections.

7. Testing

Before fully closing the access panel, turn on the power to the aircon unit and test the new fan motor.
Listen for any unusual noises and ensure the fan blades are spinning smoothly.
Use a multimeter to verify that the electrical connections are working correctly.

8. Finalizing

If the fan motor is functioning properly, turn off the power again and securely close the access panel.
Double-check all connections, ensuring they are tight and secure.

Indications of a Faulty Indoor Unit Aircon Fan Motor

A faulty aircon fan motor can lead to various symptoms and issues within your air conditioning system. If you notice any of the following indications, it could be a sign that your aircon fan motor is not functioning correctly and may require attention:

1. Weak or No Airflow

One of the most common signs of a faulty fan motor is a decrease in or complete lack of airflow from the indoor unit. You might feel little to no air coming out of the vents.

2. Uneven Cooling

If some areas of the room are significantly cooler than others or if there are hot spots, it could indicate that the fan motor is not circulating air properly, leading to uneven cooling.

3. Loud or Unusual Noises

A malfunctioning fan motor may produce grinding, squealing, or rattling noises as it struggles to turn the fan blades. These noises can be indicative of worn bearings, loose components, or other mechanical issues.

4. Fan Motor Not Running

In some cases, the fan motor might not start at all, leading to no airflow or cooling. This could be due to a motor failure, electrical issue, or a problem with the control board.

5. Unit Not Cooling Efficiently

If your aircon unit is running but is struggling to cool the room effectively, the fan motor might not be providing the necessary airflow over the evaporator coils for proper cooling.

Aircon Indoor Unit Fan Motor Replacement Cost

The cost of replacing an aircon indoor unit fan motor can vary depending on several factors, including the brand and model of the air conditioning system and the labor charges in your location. Additionally, the overall cost may also depend on whether other components, such as the blower or fan blades, need to be replaced along with the motor.

As an estimate, the cost of a replacement indoor unit fan motor can range from $150 to $450. This cost typically includes the price of the new fan motor, which can vary based on the specific system requirements and the brand. Additionally, you may need to factor in the cost of any associated parts, such as the blower or fan blades, if they are not included with the fan motor.