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Volkswagen Jetta A/c Compressor

Signs of a Failing Volkswagen Jetta AC Compressor

The main role of your Volkswagen Jetta's AC compressor is to bring refrigerant to the evaporator to get condensed and cooled. Once cool air is produced, it goes straight to the vehicle's cabin through the air conditioning vents. Without this component, cool and clean air will not be able to flows smoothly inside your car. Not only does it put the other components in the air conditioning system at risk for getting damaged, it also causes discomfort to anyone who's inside the cabin. Unfortunately, problems like this cannot be avoided with a vehicle's AC compressor. They may occur out of negligence or another failing component inside the air conditioning system. But even if you can't escape from it doesn't mean you can't prepare for it. Take note of these signs that your Volkswagen Jetta's AC compressor is going bad so you can fix them faster.

Unwanted noise

Low lubricant in your AC compressor can cause a bad whining noise. If you are hearing a loud squeal, this could be caused by a seized or locked clutch or compressor. This problem when left ignored can lead to belt damage. To avoid further damages, the car should be switched off immediately. Take note that if clutch has seized and stopped spinning, the compressor should be removed immediately for a rebuild.

Reduced airflow

If the air inside your car is cold but has been noticeably reduced, the blower could be the problem. Check the blower including the switch, the resistor, the motor, and the relay for any sign of damage.

Electrical issues

If your Volkswagen Jetta's AC compressor does not respond after the interior climate controls have been turned to the A/C setting, then you might be experiencing an electrical issue. When turning the controls, the compressor should make a sound and the engine is supposed to have a change in pitch. Inspect the electrical wiring harness adapter plug located at the compressor and make sure that it's not loose or disconnected. Also, do check both the primary and secondary fuses and make sure not one of them is blown.

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  • Tips on How to Keep Your Volkswagen Jetta AC Compressor in Great Condition 27 February 2013

    The comfortable environment inside your vehicle greatly depends on its air conditioning system. This system is made up of many components that work together to bring cool and clean air inside the cabin of your Volkswagen Jetta. One of the major players in the air conditioning system of a car is the AC compressor. This component is the one primarily responsible in sending refrigerant to the evaporator. This refrigerant will get condensed and cooled in the evaporator before it passes through the air conditioning vents to enter the car's passenger compartment. Unfortunately, some problems in the air conditioning system can affect the AC compressor and cause it to stop working properly. To avoid these problems, here are a few helpful tips on keeping your car's AC compressor in great condition.


    Inspect the AC compressor on a regular basis.


    Make it a point to examine the compressor's connection with the wiring harness which can be found on top of the compressor. Test the tightness of their connection by pushing them together in a gentle manner. Also check the panels for the fuses in both the primary and secondary fuse box. You can find the primary box in the engine bay near the fender on the driver's side. The secondary fuse box, on the other hand, is usually located on the driver's side of the car behind a kick panel. Make sure to inspect all the fuses. If one of them looks blown, replace it immediately.


    Replace the compressor regularly.


    If the AC clutch is making a loud squealing sound, does not engage, or does not lock into place, then you have to replace your compressor with a new one. Any AC compressor that is no longer producing enough pressure and is already having internal leaks should not be neglected and should be replaced immediately. Make sure these damaged components are replaced on a regular basis because using a faulty air-conditioner can damage your vehicle even more.


    Clean the compressor.


    Make it a habit to clean your AC compressor before the cold season every year. Aside from saving you money, it will also make the compressor perform better and last longer. Get rid of any noticeable debris and spray the remaining dirt with a hose.