How to Detect Car Air Conditioning Faults?
2 Answers
Methods to detect car air conditioning faults: 1. Check the air volume from the air conditioning vents. If the air volume is insufficient, inspect the air filter element and remove any debris if present; 2. Listen for abnormal noises near the compressor. If any are heard, check the compressor's installation; 3. Inspect the condenser's heat dissipation fins for dirt coverage. If dirty, clean them; 4. Check for oil stains at each connection point of the refrigeration cycle system. If oil stains are found, it indicates a leak. Tighten the connection or replace the part; 5. Turn the blower to low, medium, and high settings, listen for any abnormal noises, and check if the blower operates normally. If there are noises or abnormal operation, replace the blower.
Detecting Car AC Issues – Here's Some Practical Experience. First, start the car and turn the AC to maximum cooling, listen for the 'click' sound of the compressor engaging. Feel the temperature change at the air vents with your hand – if cooling is not noticeable, the refrigerant might be leaking. I also check the low-pressure pipe near the compressor; it should normally frost up. If it's not cold at all, there's an issue with the cooling system. Next, inspect if the condenser fins are clogged with willow catkins or mud, rinse them with a high-pressure water gun and test again. Oil stains on pipe joints indicate leaks – apply soapy water, and bubbles will show the leak point. A smelly filter can cause odors inside the car; replacing it takes just half an hour by removing the glove box. Finally, check if the electric fan is running – replace the fuse if it's blown. These steps are simple and can save you a lot of money by doing it yourself.
