Staff(WDL) informed that pax feedback air-conditioning was not working in car 2538. TC checked and c onfirmed no air-con fault indication. Staff(CBR) checked andconfirmed no air-con was faulty and car was cooling. ~~~~~ 2538 Staff(WDL) informed pax feedback A/C not working. TC checked and confirmed no air-con fault indication. Staff (CBR) confirmed no air-con was faulty and car was cooling. CE checked & found 2538 A/C 1-1 & 1537 2-2 coolant fault.  2538 A/c 1-1 found system pressure low.    Tightened suction connector & discharge/vacuum/retop 407C freon. Function check - OK. #1537 A/c 2-2 found system pressure high. Cleaned condenser filter & fins. Function check - OK. Both cars saloon temp. 24*C.  Hanafi/Chan SW 44574