Is Your A/C Making Your Car Shake? How to Troubleshoot the Problem

AvatarByCarl Frisch

A/C makes car shake is a common issue that arises from time to time in automobiles. It is caused by an irregularity in the air conditioning system, which causes the car to shake or vibrate when the air conditioning system is running. This shaking can range from a mild vibration to an intense shaking, depending on the severity of the problem. The cause of this shaking can vary from something as simple as a loose belt or hose connection to something more complex like an issue with the air compressor or other components of the air conditioning system. In order to diagnose and repair the issue, it is best to take your car to a qualified mechanic who can determine what is causing the shaking and provide you with a solution.

Causes of a Car Shaking

A car shaking can be caused by a variety of issues, such as mechanical, tire, suspension, and electrical problems. Mechanical issues can cause cars to shake if there are worn or broken parts in the engine or transmission. Tire problems can cause a car to shake if the tires are out of balance or have worn treads. Suspension issues can lead to shaking if the shocks and struts are worn or damaged. Electrical problems can also cause a car to shake if there are faulty spark plugs, bad wiring, or other electrical components that need to be replaced.

Troubleshooting a Car That Is Shaking

When troubleshooting a car that is shaking, it is important to check the tires and suspension components first. This includes inspecting the brakes and rotors for signs of wear and tear as well as checking for any loose parts or damaged components. It is also important to examine the engine mounts and exhaust system for any signs of wear or damage. Lastly, it is essential to test all electrical system components including spark plugs and wiring for any potential problems that could be causing the shaking.

Common Signs of a Worn or Faulty A/C Compressor

If an A/C compressor is worn or faulty, there are several signs that may indicate this issue. The most common sign is leaks in the system which could be due to an old compressor seal that needs to be replaced. Another common sign is unusual noises coming from the compressor itself which could indicate internal damage that needs to be repaired. Poor cooling performance can also indicate an issue with the A/C compressor which should be checked by a professional mechanic immediately.

How to Maintain an A/C Compressor for Optimal Performance

To maintain an A/C compressor for optimal performance it is important to regularly check for any type of leaks in the system and replace any worn out seals or other components as soon as possible. It is also important to have regular maintenance services performed by a professional mechanic in order ensure optimal performance from your A/C compressor over time.

Best Practices when Diagnosing Car Shaking Caused by A/C Compressors

When diagnosing car shaking caused by an A/C compressor it is essential to utilize OBD II scanners in order to check for codes that may indicate an issue with the system itself. Visually inspecting all components of your A/C system including hoses, belts and compressors can help identify potential problems before they worsen over time. Lastly, properly cleaning and replacing any necessary parts will help ensure your car’s A/C system runs smoothly without causing your vehicle shake while driving.

A/c Makes Car Shake:

If you have noticed your car shaking while the air conditioning is running, it is most likely due to one of two different causes. The first cause is a poorly maintained air conditioning system, while the second cause is a mechanical issue with the car itself.

Poorly Maintained Air Conditioning System

The most common reason for an automobile’s air conditioning system to make the car shake is due to a lack of regular maintenance and servicing. An air conditioning system should be inspected and serviced at least once every two years, and any minor issues should be addressed as soon as possible. An old or poorly maintained air conditioning system can lead to several problems that may cause the car to shake when the A/C is running, such as:

  • Low Refrigerant Level – When refrigerant levels become too low, it can cause vibrations throughout the vehicle.
  • Compressor Issues – A failing compressor will create a large vibration when running.
  • Defective Fan Belt – If the fan belt that runs from the compressor to the engine’s pulley isn’t tight enough, it can create vibrations through the entire vehicle.
  • Faulty Bearings – Worn or faulty bearings inside of an air conditioning unit can create vibrations that will travel through the entire vehicle.

In order to address these issues with your air conditioning system, you should have it inspected and serviced by a qualified technician. They will be able to properly diagnose any issues with your A/C and recommend any necessary repairs or replacements.

Mechanical Issues With The Car

Another common reason for a car shaking while running its A/C could be related to mechanical issues within the car itself. In some cases, vibrations from an old or worn-out engine mount or transmission mount can be amplified by turning on an A/C unit. In order for these issues to be properly diagnosed and fixed, you should take your vehicle in for an inspection by a qualified mechanic. They will be able to properly diagnose any issues related to your engine or transmission mounts, as well as any other issues that may be causing your car’s vibration while running its A/C unit.

FAQ & Answers

Q: What causes a car to shake?
A: There can be several causes for a car shaking, including mechanical issues, tire problems, suspension issues, and electrical problems.

Q: What should I do if my car is shaking?
A: First, you should check the tires and suspension components. Then inspect the brakes and rotors, examine the engine mounts and exhaust system, and test the electrical system components.

Q: What are common signs of a worn or faulty A/C compressor?
A: Common signs of a worn or faulty A/C compressor include leaks in the system, unusual noises from the compressor, and poor cooling performance.

Q: How can I maintain an A/C compressor for optimal performance?
A: To maintain an A/C compressor for optimal performance, you should regularly check for leaks in the system, replace any worn or damaged components, and have regular maintenance services performed by a professional mechanic.

Q: What are best practices when diagnosing car shaking caused by an A/C compressor?
A: Best practices when diagnosing car shaking caused by an A/C compressor include utilizing OBD II scanners to check for codes, visually inspecting all components of the A/C system, and properly cleaning and replacing any necessary parts.

In conclusion, the cause of a car shaking can be attributed to a variety of factors ranging from worn out brakes, faulty suspension components, tires that are out of balance, and even an engine misfire. Proper maintenance and regular servicing are essential to ensure that the car’s components are in good working order. If a car owner suspects that their vehicle is shaking, they should take it to a certified mechanic as soon as possible for diagnosis and repair.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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