Updated at: 30-08-2022 - By: Lucas

Air conditioning in a vehicle is intended to keep you cool and comfortable while driving. The car may shake and vibrate as a result. No need to panic, we’re here to assist you with this frustrating issue!

Low refrigerant levels, which result in compressor overload, are the most common reason of your car shaking when the AC is on. It is essential that you perform a thorough inspection of your vehicle to ensure that there are no leaks and that the condenser coils are clear.

Make sure your AC unit’s evaporator core is thoroughly cleaned by your repair!

There are a number of reasons for this problem, and we’ll go through them in detail in this blog post. For additional details, please continue reading.

How Does A Car AC Work?

Car Shakes When Ac Is On

An AC compressor compresses the refrigerant in a car’s air-conditioning system. It gets hot because of the compression and the heat generated by the compressor’s action. the system is under increased stress while this is taking place

An expander or turbine vanes attached to the condenser transfer the hot gas under pressure from the compressor to the condenser, where it is subsequently released into the atmosphere.

Afterward, the high-pressure gas flows into an expansion valve, where it absorbs more heat but at lower pressure, to turn into a liquid state.

A receiver dryer removes moisture from the low pressure liquid so that it can deliver the cool vital oil needed for the compressor’s operation.

As a next step, a capillary tube is connected to the receiver drier, which in turn sends cool essential oil to the evaporator, where it absorbs heat from air that is being blasted by the car’s fan to provide cool air inside the cabin.

After completing all of these steps, the cold air from the car’s vents re-energizes you after a long day at work, making the drive home even more enjoyable. Electronic expansion valves are now standard on all new cars.

How Can An AC Cause A Car To Shake?

Car Shakes When Ac Is On-2

To compensate for a lack of refrigerant, your air conditioner’s compressor will overheat. This causes the entire system to overheat, which diminishes the cooling efficiency when the system is turned back on..

You may notice that even if cold air is coming out of the car’s vents, it does not push enough air through your car’s vents when it is really hot outside. Simply put, this means that even when the air conditioning is on, your vehicle isn’t getting enough cool air.

Due to a lack of refrigerant in your AC, releasing some warm engine bay air into the condenser and diluting what is already there would produce less effective cooling, hence this is the reason.

Even with the compressor running, your AC might suddenly cease operating.

As a result of the compressor working harder than usual, your automobile will shake or vibrate, giving the impression that something is wrong. Excessive cabin noise will also be a problem for both the driver and the passengers.

Because you are still getting regular airflow rather than refrigerated airflow, the symptoms of a broken air conditioning system are more likely to occur if the AC is fully out.

It is necessary to do a recharge in order to restore coolant-free fresh air in your cabin after the old refrigerant has been entirely removed.

Additional Car Shaking Reasons Associated With AC

In addition, and this is the most common:

The easiest method to find out what’s wrong with your vehicle is to take it to a technician for a thorough examination and repair.

How Do You Know When Your Car AC Needs To Be Recharged?

As a result, your car’s air conditioning system will not perform as well as it should, resulting in the following symptoms:

Following our discussion of AC systems and what to do if they don’t cool adequately, we will teach you how to recharge a car AC yourself.

How To Refill An Car AC?

Car Shakes When Ac Is On-3

As soon as the temperature drops, turn on the heater to activate the condenser fan and blower fan, which will keep the air moving. The AC refrigerant tube connects to the receiver/drier while you open the hood of your car.

After arriving at the connection location, use a wrench to remove any residual liquid from it. Connect the AC refrigerant hose to the low side of your car’s AC with dye (we prefer black dye). Using this method, you can quickly identify any leaks by observing the color change in the dye.

Attach a drill bit with an adapter (included in the AC recharge kit we purchased from Amazon) to an area where the high pressure switch is placed (anywhere near the air filter beneath your hood).

Start your drill and hold the trigger down for roughly 10 minutes. In the meanwhile, check sure that all of your AC’s valves are not closed.

Drain any remaining liquid by inserting a wrench into the dye-filled hose’s other end and turning it off. Reinstall everything you took out of the car.

Attach the fresh can of refrigerant to the high side of your car’s air conditioner. Start your car as soon as you’re finished. Use a wrench to open the replacement refrigerant cylinder’s top valve and point it toward the low-side port..

When everything is connected, turn on your AC to its maximum setting and let it run for around 5 to 10 minutes. Then, switch off your air conditioning. Turn the valves counterclockwise to ensure that they are all open.

Close both valves. Once more, turn off the engine. Open only the portions that need to be opened first. Check to see if the dye can be seen elsewhere (low pressure switch).

If this is the case, you should also remove the hoses from these fittings. Using a wrench, remove the remaining liquid. Remove the refrigerant from the receiver/drier connection point using a wrench afterward.

All other elements of your car’s AC can now be closed simply twisting them clockwise after you’ve drained any remaining liquid. Open the refrigerant cylinder valve with the wrench. Then, with the engine running at its most cooling level, increase the power.

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When utilizing your AC, make sure there are no power outages by using a voltmeter. Turn on the AC at its highest setting. Make sure everything in your cabin is working properly.

Dispose of any foul green colored liquid that has formed inside the low pressure line connector if it does not cool down.

The first step is to make sure there are no leaks in your car’s air conditioning system, so we can proceed with the installation of a new R134A. Apply dye to the high side port by opening both valves. Start your engine and let it run for around 10 minutes after filling up the low side port as well.

It is time to turn off the engine. Now, examine the receiver/drier connection point for any leaks. Let’s check your car’s AC pressure and see if there are any obvious leaks. After you’ve added the appropriate amount of refrigerant, look for any signs of leakage.

Open all valves from the high side to the low side. Turn on your air conditioning system to full power after this. It is important to make sure that both the green and black LEDs are on at once Using a wrench, open the air conditioning unit.

Your engine should be running for at least a few minutes before the green LED lights go off. You can do this by turning off your air conditioner and pushing the automatic climate control mode button to check the temperature. While you’re at it, check to see whether your air conditioner is leaking (if your engine is still hot)

Close the valves on both sides with a wrench if everything appears to be in order. Ensure that the engine is off and all other components are shut off. Add dye to the low-side port and pump in fresh refrigerant if necessary now that the color has been added. Before starting your car, wait a full ten minutes.

It is important to make sure that both the green and black LEDs are on at once Once your car has been started again, look for any leaks.

If everything goes according to plan, we’ll be done in no time.

You can remove all the hoses and expel the refrigerant from the receiver/drier connection point with a wrench one more time before you remove the compressor. After that, screw it back on counterclockwise to re-close it.

There’s nothing else to say. A big thank you for completing your replacement.

The hoses may now be removed with ease. Find any apparent or hidden leaks. If there are no issues, then you’re all set. When all else fails, repeat the process with new components.


How Do I Know If My AC Is Leaking?

Your air conditioning system may be leaking if you detect any liquid dripping from it. To avoid more damage, plug the leak as quickly as feasible.

Is It Safe to Use an AC Leak Detector?

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Yes, an AC leak detector is safe to use. When it comes to finding potential leaks before they cause further damage, it is highly suggested.

With the help of this article, you should be able to fix any AC issues you may be having on your own. Before igniting your engine, make sure you’ve followed the directions exactly and checked everything. Make sure to address any leaks as soon as possible if there are any.


Even though AC issues can be a genuine inconvenience, you should be able to handle them on your own with the guidance provided in this tutorial. Start your engine only after you’ve double-checked everything and followed the directions exactly.

If there are any leaks, make sure to fix them immediately, or else you might end up causing further damage to your car’s AC system. With a bit of patience and some essential tools, you should be able to get the job done in no time!