hi everybody i am vijay. i own fiat linea 1.3mjd emotion pack 2010 model . From last year summer the car ac has started giving me problems. I found it not cold enough so i charged it with freon it was good for few weeks but then again cooling dropped and again charged it with freon and took the car to some ac mechanics to find out if there are any leaks in the ac system they checked the ac system for leaks but they were not able to find any. some mechanics told me the evaporator to be the culprit and told me to get it changed. but i am still not convinced with them. i think the effectiveness of ac decreases gradually only if there is a leak. please correct me if i am wrong and help me resolve the problem.