Before we jump into why your window air conditioner fan not working let’s see some things. In today’s world, window AC user increases day by day. It’s not just that AC is used as a heating solution. The use of AC in indoor air purification is also very common. The most elementary sort of air conditioner is a window air conditioner. It is a single unit that contains all of the parts and components in a single box or case. 

This type of air conditioner is typically placed or installed in a window and connects to a standard plug box home air conditioner in the window. A cooling coil with an air filter is attached. The heat exchange between the refrigerant in the system and the air in the room occurs on the cooling coil. 

A rotational evaporator fan is used to discharge cool air into a chamber. An expansion device is a Capillary Tube. 

Through this blog, we will try to find out work on different parts of the AC with the reasons why the window ac fan is not working, and also the solution to the problems.

window air conditioner fan not working

Reason Why My window Air Conditioner Fan Not Working( Answer)

If you have a window air conditioner in your home, you may detect that the fan is not working as often as it should for various reasons. The job of your AC fan is to keep the hot air out constantly. This fan also attracts a lot of dust and dirt while doing this work. 

That’s why the sound can come from the fan, so the normal function of the AC will be blocked. As a result, your window air conditioner will not function properly here. The fan or fan motor could be the issue if your window air conditioner isn’t blowing any air. Ensure that the fan motor works freely and that the blades are in good condition. If the motor has seized or the fan blades have been damaged, they must be replaced. And you become tense about why your window AC fan is not working. 

We will try to find out the various reasons why the AC fan does not work and the ways to solve it by writing below.

A Fan’s Function In A Window Air Conditioner

The window air conditioner’s evaporator is exposed to the outside weather. The high-temperature environment is pulled by the blade fan placed behind the condenser, which then blows the air over the condenser. The refrigerant inside the condenser is extremely hot and must be cool in order to achieve the required cooling effect.

Read more: Is It Better To Leave AC Fan On Or Auto? ( Explained)

Window Air Conditioner Fan Mode

Fan Mode on the Air Conditioner Your thermostat is connected to the fan for central air conditioning systems. This fan circulates heated air back into the condenser (which is the significant unit outdoors). The atmosphere is recirculated from the condenser to the furnace, where it is turned into the cold air and supplied into the rooms using ducts and vents.

Be aware of the following signs and symptoms of an AC fan motor fault:

1. AC Fan Not Starting 

The fan does not work even when the air conditioner is turned on. 

2. AC Fan Won’t Stop 

The fan continues to run even after the air conditioner is turned off. 

3. Blades that swing slowly

When the fan is switched on, the blades rotate pretty slowly.

4. When Blades of the Outside Fan Still Moving

If your cooling system is turned on, you should hear the compressor and can see the fan blades working. If the air conditioner is turned on, but the edges are really not moving, there’s a concern.

5. Creates Unusual Noise

Your AC fan motor is likely acting up if you hear creaking noises from your condenser unit when the fan turns on. A whistling or vibrating AC fan motor could indicate difficulty with the motor blades.

6. AC Drops Periodically

An overheated motor could be the cause of your air conditioner’s intermittent shutoff. There could be a problem with the switch or the wheel itself in this case.

7. AC Does Not Flow Cold Air

If your air conditioner isn’t blowing cold air, it could be because the blower motor is damaged. To guide you in troubleshooting and correcting the problem, contact a local HVAC professional.

5 Reasons For Fan Not Working In A Window Air Conditioner

1. Capacitor failure

A damaged capacitor is one significant factor for your AC fan to stop working. The capacitor is a small, cylindrical element that supplies energy to the motor of your AC unit. It’s in charge of putting on the air conditioner and providing extra electricity as needed to keep it working.

Indications of an awful capacitor include:

  • The air conditioner won’t turn on
  • The air conditioner is turning off on its own.
  • The air conditioner isn’t blowing chilly air.
  • The air conditioner creates a buzzing sound.

You can test the capacitor by utilizing a screwdriver or little stick. Tenderly slide the stick between the vents and give the fan a sharp edge a slight push. Assuming the fan fires up and continues to turn all alone, the capacitor is terrible.

2. Defective Motor

The condenser fan engine on your air conditioner is responsible for turning the fan’s edges and blowing outside air across the AC condenser loops. This cycle converts hot refrigerant gas into a cool fluid, allowing your home to be cooled. 

When your AC unit’s fan stops turning, the most significant reason is a broken engine, which should be restocked as soon as possible because this will impact the performance of the system.

3. Issues with Contactor

The flow of power through your air conditioner is controlled by an AC contactor, which is a small device. These microscopic parts are in charge of conducting and limiting the electrical currents that notify your air conditioner whether or not it should function when you set the thermostat on your thermostat. Contactors burn out frequently as a result of regular wear and tear or when your system overheats. 

When a contractor burns out, the electrical flow of your system is interrupted, and the adjacent AC components are unable to receive power, resulting in their failure. A contractor can also become trapped in one of two roles: “up” or “down.” 

The electrical flow between components is restricted when contactors are stuck in the “up” position, whereas contractors in the “down” position continue to run power to their sections even after the cooling cycle is due to terminate. 

It’s possible that the contactor directing power to your AC fan is locked in the “up” position or has burned out if your AC fan has stopped moving. Proper maintenance is vital to keep your circuits in good operating order, but replacements may be needed at times.

4. Damaged Belt

Most contemporary air conditioners do not use a belt system and instead rely on direct motors. A broken belt, on the other hand, could be the cause of your fan not working correctly in older systems. 

AC belts grow more prone to fraying, tearing, and other problems as they age. If your belt is worn out, it will make strange clanging, clicking, or squeaking noises. A broken belt will prohibit your system from functioning correctly, including the AC fan.

5. Cracked Fan Bled

Cracked fan blades could be another reason your AC fan isn’t operating. The fan blades are usually visible through the outside unit’s vents. We recommend turning off your system until a licensed HVAC technician inspects and repairs it if any of the blades seems bent, cracked, loose, or otherwise destroyed.

To address those issues, you can first clean and inspect the fan, then check the motor bearings, and finally, replace the motor.

Note: Paying close attention to the signs of a faulty AC motor could save you a lot of trouble down the road. Attending your air conditioning problems as soon as possible could save you and your loved ones a lot of money and sanity.

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Top window air conditioner brands:

  • Amana AMAP050BW Window Air Conditioner
  • LG LW1517IVSM Window Air Conditioner
  • Midea MAW12V1QWT Window Air Conditioner
  • Whirlpool WHAW081BW Window Air Conditioner
  • Haier ESAQ406 Window Air Conditioner
  • GE AEG08LZ Window Air Conditioner
  • Frigidaire FGRC1044T1 Window Air Conditioner
  • LG LW6017R Window Air Conditioner
  • Amana AMAP151BW Window Air Conditioner


When your window air conditioner fan is not working, You may be tempted to get a new one. Repairing the fan in a window air conditioner, on the other hand, can be as simple as spraying the bearings with a penetrating oil lubricant or as expensive as replacing the motor assembly. I hope you get the reason for the window air conditioner fan not working.

Window air conditioner fan motors are inexpensive and have welded housing, so replacing them is less expensive than repairing them. For your consideration, mentioned renowned HVAC sites name given below:

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