Recently I had done a 600 km trip in my xcent petrol. While I was returning I noticed that the AC's effect was very poor. It was working fine for a few kms and then suddenly the air flow dropped drastically and the effect was completely gone. What surprised me is that the next day it worked absolutely fine. I noticed the same problem again on a long run with the car and again it stopped working after sometime and then came back to normal state ( I got the filters changed just before the drive)
What do you think might be the problem?
PS the car has clocked over 68000kms