TC reported train door at Front DT car A4 door did not open at ORC & NEW . Staff (NEW) checked and f eedback train door opened at NOV & TAP. ~~~~~ 3608 TC reported A4 train door did not open at ORC & NEW. Staff (NEW) feedback train door opened at NOV & TAP. CE: 3608 A4 door having intermittent opening Door Fault. Check AT WDL/ADM/SBW Door Opening/Closing OK. At YIS Door did not Open Depot to check 3608 train doors operation.  3608 A4 saloon door found LHS outer door roller delaminated. Removed & replaced door roller. Door static check - Passed.  Kamarul/Aliff 45161