TC reported air-con fault. Unable to reset. Staff (KTB) checked and confirmed that Rear M2 car #1 an d #2 set air-con faulty. Unable to reset. Car was warm. ~~~~~ TC reported air-con fault. Unable to res     Further check found APS "K" contactor hunting.Check Tims at APS page shown IGBT gate was off and line voltage present.Both a/c was (P/V/F)Replaced APS K contactor and carried out APS no power test 6 car result ok.Both a/c check cut in/out ok,fault was clear. Done by Zul/Joshua/Firdaus/Faddzal. 06/08/20