Originally Posted by batosai sir sabi ng technician bka daw nag high pressure ang aircon q, dapat daw palitan ang expansion valve. Eto po kaya talaga ang sira? Sir wala po sigurong butas kasi minsan naman malamig kahit naka high speed You have said that its happened only at high speed but not on low speed. This may sounds like you have a vacuum leak. Check this thing first.