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.
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.
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.
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.