If you feel there is nothing unusual in AC performance car, the first suspicion should addressed to the AC compressor. Mild symptoms such as undue noise, blowing hot air at low rpm, it could be an early indication of damage to the compressor. Apparently not only sound being the symptoms, there are a few traits that make you have to be alert and immediately check the AC compressor. Recognize the characteristics of the AC compressor problem.
Characteristics: When the AC is converted to the “1-2-3″ (the AC to work), sound a bit rough, or could be interpreted as a snoring sound like friction. Once the button is shifted again to the “OFF” position, the voice behind the hood back to normal. The cause of the sound rude / snoring could be due to oil less compressor / exhausted, worn piston, bearing trush loose, until the U.S. less precision.
2. compression reduced
Characteristics: For early stage airflow feels less cold air when the engine is at low rpm. When gassed or start the car in a certain speed, turns and starts blowing cooler.
Characteristics: Blowing air conditioning does not cool gradually, depending on how big the leak. The larger the leak, the faster runs and faster freonnya felt no cold air in the cabin. But the average leakage at the compressor typically takes one to six weeks, until the freon runs total.
4. Magnetic clutch
Characteristics: Most of this occurs when the car is subject to traffic or road crawling. The cabin air was cold, suddenly not at all. After a while the switch is turned off, then turned on again, the performance of air conditioning back to normal, and usually accompanied by high engine RPM, above the 1 (1,000 rpm).