TC reported front DT car A2 train doorsdid not open. Staff (YWT) checked and confirmed. The faulty door was later isolated in closed position by staff (YWT). ~~~~~ TC reported front DT car A2 train doors

No FC observed in Tims display,door was difficuty to open,Remove RHS door leaf door able to open on the LHS door,RHS door very stiff resistance.Removed door and found outer roller faulty,change out ok.All door static test and measurement within Critera.Door cycle tested ok.
Done by Koh.  29/06/23