Passenger feedback to station staff(SBW)that there was water leaking from aircon at the front M2 ca r. Staff(MSL) checked and confirmed presence of some aircon condensation at front M2 car near A4 door. ~~~~~ 2666 Passenger feedback to station staff(SBW) that there was water leaking from aircon. Staff(MSL) confirmed presence of some aircon condensation at front M2 near A4 door. CE reported 3665 No:1 end ceiling panel condensation. Temp at 24.5'C and 2666 No: 2 end ceiling condensation. Temp at 24'C.  3665 replaced A/c 1 filter & purged drain pipes. #2666 replaced A/c 2 filter & purged drain pipes. Monitor both A/c units & found no condensation on the ceiling panels. Both saloon temp. 24'C.  Chan SW/Hanafi 44323