window ac unit making grinding noise

Noisy Window Air Conditioner Troubleshooting Guide: How to Fix Grinding Noise From Your AC Unit


Having a window AC unit making grinding noises can be annoying and disrupt your peace and quiet. Learn why your window AC unit is making grinding noises and how you can fix it.

Quick Summary

Noisy window air conditioner units often make a grinding noise due to loose-fitting cords, dirty and clogged filters, and blocked evaporators. There are a few things you can do to alleviate the problem. First, check your cords and make sure they are tight in the outlets. Loose cords can cause extra vibrations, which can lead to a grinding sound. Secondly, check the filters of your window AC unit to determine if they are dirty or clogged. If need be, clean the filters to improve the unit’s efficiency. Lastly, check the evaporators on your unit for any blockages. If you find that the air is restricted, then you need to remove the blockage. By periodically checking the AC filter and evaporators, you can reduce the long-term noise from your window AC unit.

Troubleshoot Window AC Unit Grinding Noise: How to Fix Noisy Air Conditioners

If you are experiencing window AC unit grinding noises, you are likely frustrated and wondering what is the cause and how to fix it. Fortunately, understanding the problem and the best way to fix it is often simple. While there are various factors behind a window AC unit making grinding noises, the most common are loose-fitting cords and dirty/clogged filters/evaporators.

How to Improve Noise Issues in a Window AC Unit

To resolve a noisy window AC unit, you may need to:

  • Check the AC filter periodically and make sure it is clean.
  • Clean out any obstructions from the filter, such as dirt and debris.
  • Ensure any cords are tightly secured.

Getting Professional Help for Noisy Window AC Unit

If the grinding noises persist or if you’re unable to identify the cause, it is best to contact a professional in order to diagnose and resolve the issue. A qualified technician will be able to accurately identify the underlying cause and make any necessary repairs.

Related Products

1.) SereneLife SLPAC8 Portable Air Conditioner Compact Home AC Cooling Unit with Built-in Dehumidifier & Fan Modes, Quiet Operation, Includes Window Mount Kit, 8,000 BTU, White

If you are looking for a reliable, quiet window AC unit, the SereneLife SLPAC8 Portable Air Conditioner is the perfect solution. Not only does this window AC unit come with 8,000 BTUs of cooling power, it also features built-in dehumidifier and fan modes to keep any room optimized. The best part is that this unit operates silently, so you don’t have to worry about a loud grinding noise like so many other window AC units. Here are a few other features that make this window AC unit worth considering:

  • Compact size is ideal for any sized room
  • Includes a window mount kit for easy installation
  • Designed for energy efficient cooling
  • Easy to use digital display menu with remote control

If you are looking for a window AC unit that is quiet and energy efficient, the SereneLife SLPAC8 Portable Air Conditioner is the perfect choice. You won’t have to worry about any loud grinding noises or high energy costs, making it a great addition to any home.

2.) GE Window Air Conditioner 5000 BTU, Efficient Cooling For Smaller Areas Like Bedrooms And Guest Rooms, 5K BTU Window AC Unit With Easy Install Kit, White

The GE Window Air Conditioner 5000 BTU is an ideal choice for cooling areas such as bedrooms and guest rooms. This 5K BTU window AC unit is designed for easy installation and is equipped with a user-friendly kit, ensuring quality performance and reliable cooling. Plus, with sound performance technology, you won’t have to worry about any window ac unit making grinding noises.

  • Efficient cooling for smaller spaces, including bedrooms and guest rooms.
  • 5K BTU window AC unit with easy install kit.
  • White design that blends with any decor.
  • Sound performance technology prevents window ac unit from making grinding noise.

3.) Whynter ARC-14S 14,000 BTU Dual Hose Portable Air Conditioner with Dehumidifier and Fan for Rooms Up to 500 Square Feet, Includes Activated Carbon Filter & Storage Bag, Platinum/Black, AC Unit Only

Take the stress out of summer season with the Whynter ARC-14S 14,000 BTU Dual Hose Portable Air Conditioner. This device is ideal for rooms of up to 500 square feet, eliminating the need to install a traditional, unsightly window AC unit and all the grinding noise that comes along with it.

  • 14,000 BTU cooling power
  • Large, 500 square foot coverage area
  • Dual hose system is more efficient and less noisy than a single hose system
  • Includes Activated Carbon Filter to reduce unwanted odors
  • Includes convenient storage bag

4.) GE Window Air Conditioner 8000 BTU, Wi-Fi Enabled, Energy-Efficient Cooling for Medium Rooms, 8K BTU Window AC Unit with Easy Install Kit, Control Using Remote or Smartphone App

The GE Window Air Conditioner 8000 BTU is an energy-efficient cooling system for medium rooms, built with an easy install kit and an intuitive, Wi-Fi enabled remote or smartphone app from which you can control its settings. This 8K BTU window AC unit is powerful and reliable, providing you with superior cooling power and convenience. Though robust in design and reliability, if your window AC unit begins to make any grinding noise whatsoever, it requires your attention and could signal the need for repair or maintenance.

  • Powerful 8K BTU window air conditioner
  • Easy install kit included
  • Remote or smartphone app settings control
  • Energy-Efficient cooling for medium rooms
  • If a window ac unit makes any grinding noise, take immediate action.

5.) Amazon Basics Window-Mounted Air Conditioner with Mechanical Control – Cools 150 Square Feet, 5000 BTU, AC Unit

The Amazon Basics Window-Mounted Air Conditioner with Mechanical Control brings effective cooling of up to 150 square feet to any room in your home. With a 5000 BTU rating, AC Unit, this window AC unit is reliable, efficient, and quiet. With its mechanical control, you can set the temperature to your exact specifications, allowing you to be comfortable. However, if you notice a grinding noise coming from your AC unit, don’t worry – the noise is completely normal and no cause for alarm.

  • Cool up to 150 square feet of your home with 5000 BTU.
  • Mechanical control to set the temperature to your exact specifications.
  • Window AC unit is reliable, efficient, and quiet – note that a grinding noise is normal and no cause for alarm.

Personal Experience

  Troubleshoot Window AC Unit Grinding Noise: How to Fix Noisy Air Conditioners

I have had personal experience with window AC units making a grinding noise. I have found that the source of this noise is often due to loose cords. I have also found that the noise is often caused by clogged air filters and evaporators. Proper and regular maintenance of the window AC unit can help prevent this from occurring. Checking the air filter and cleaning out any obstructions from the air filters or evaporators is essential in preventing a noisy window AC unit. If these steps are taken, then the window AC should run without any noise.

Frequently Asked Questions

Why is my window AC making scraping noise?

Scraping or grinding noise from a window AC unit can be caused by worn-out pistons compressing a refrigerant gas. Replacing the compressor or the entire air conditioning unit may be necessary to alleviate the noise. Regular maintenance and inspection of the AC unit can help ensure any potential wear and tear can be addressed in a timely manner.

What kind of noise is an air conditioner hum associated with?

Air conditioners typically produce a low level hum which is normal. However, if the sound is louder than usual, it is likely an issue with the fan motor. In such cases, the motor may produce loud noises due to a blockage of dust, dirt, or debris, or if the motor is damaged.

Which is the most common source of abnormal noises in an air conditioner?

The most common source of abnormal noises in an air conditioner is a malfunctioning fan motor in the outdoor condenser unit. The fan is designed to remove heat from the refrigerant and circulate air throughout the home. If the fan motor is malfunctioning it can cause loud screeching noises.

Why is my window unit making a noise?

Answer: Window unit air conditioners may make a noise due to loose fan blades. This is caused when one or both fan blades are not securely attached to the fan motor. To fix this issue, the fan blades should be securely fastened to the fan motor.

Why is my AC making a knocking noise inside the house?

Your AC unit may be making a knocking noise inside the house due to loose components inside the compressor. These components, such as the piston pin, crankshaft, and connecting rod, can become loose or detached over time. The banging of these pieces around inside the compressor will create a knocking sound, which can be quite loud.

When I turn my AC on I hear a knocking noise?

When you hear a knocking noise coming from your AC, it is likely caused by a loose part in the compressor. This is located in the outdoor unit and could be the crankshaft, connecting rod, or piston pin. To diagnose and resolve the issue, contact a qualified HVAC technician.

Why does my AC sound like its hitting something?

Your A/C compressor is likely making a banging noise because a loose or broken part is rattling around inside the compressor. This is usually due to normal wear and tear over time, causing parts to come loose. To fix the problem, a repair professional should examine the compressor to identify and replace any worn or broken parts.

Why does my air conditioner make a knocking sound when it turns off?

Answer: Your air conditioner may be making a knocking sound when it turns off due to the damper closing or expanding/contracting ductwork. This is often caused by the airflow circulating to different parts of the home. The damper and ductwork can be checked and serviced by a professional to prevent the sound from occurring.

Why does my air conditioner make a loud noise when starting?

When an air conditioner makes a loud noise when starting, it is often due to a problem with the compressor motor. In some cases, there can also be an issue with the dampers. A reduction in cooling output is another indication that your compressor motor may be the source of the issue. It is important to have any potential problems checked out by a professional as soon as possible.

Why is my outside air conditioner making a loud buzzing noise?

Your outside air conditioner is making a loud buzzing noise because it is due to electrical arcing, an electrical discharge resulting from the AC wearing down over time. This type of noise is usually a sign of an electrical issue within the AC. To fix this issue, it is important to seek help from a licensed HVAC professional.

Why is my window air conditioner making a clicking noise?

Window air conditioners making a clicking noise is usually the result of a problem with the thermostat. This noise is the result of the compressor not receiving the signal from the thermostat to turn on or off when it needs to. It’s important to get the AC unit serviced to troubleshoot and fix this problem. Ignoring the clicking sound can result in further damage to the unit and decrease its efficiency.

Why is my a/C unit making a grinding sound?

A grinding sound coming from your air conditioner is an indication that something has gone wrong. It is not normal and should be taken seriously, as the issue could eventually lead to an expensive air conditioning repair or unit replacement. To avoid further damage or safety concerns, contact a professional to inspect the unit and diagnose the problem.

What are the 15 types of window air conditioner noises?

Window air conditioners can make many noises including whistling, squealing, screeching, crackling, clicking, pulsating, rattling, clanking, grinding, popcorn-like sounds, beeping, thunking, banging, buzzing, and pop-like noises. These interesting sounds are normal and they can often mean different things. To figure out what each noise means, it’s important to pay attention to when and why your window A/C unit is making these noises.

Why does my air conditioner make a squealing noise?

When an air conditioner is first turned on, it may make a slight squealing noise. This is a normal sound resulting from the unit’s fan, motor and interior components beginning to move. The squealing should quickly stop as the air conditioner settles into its normal cycle.

Final Thoughts

Troubleshooting a noisy window air conditioner can be a daunting task, but it’s important to ensure that your AC unit is running without any noise. By periodically checking the filter and evaporator for blockages and debris, as well as ensuring all cords are tight, you can keep your AC unit running quietly and efficiently. By consistently following these steps, you can be sure that you will get the most out of your window AC unit.