TC reported rear M1 car #1 set air-con fauilt. Staff(SBW) checked and reset ok. Car was cooling. ~~~~~ 1504 reported A/C 1 fault. Staff(SBW) checked and reset ok. Car was cooling. 1504 Aircon 1 cut-out too fast .  1504 A/c 1 charged in freon & thermister cleaned. Function check A/c cut in/out operation & monitor for 1 hr - OK. Temp. able to achieve 24'C.  Huzzaidi/Faiz/Fazly 44000