TC reported front DT car A4 train doorsnot proven closed. TC opened and closed train doors twice toclear the fault. Staff (NOV) monitored the affected train d oor for three stations and feedback no abnormalities found. ~~~~~ TC reported front DT car A4 train doors Check Tims observed FC 083-A4 close operation time out.Check J-rails & guide rails no sign of FOD.Check door mating strip gap slightly out of criteria,62.3mm.Adjusted to 63.4mm ok.DCS,DLS rigging ok.Push/pull within criteria.Serviced door & performed door cyclic and static test ,satis,Timing ok. Done by Sanip. 11/02/22