Sticky door on 3073 & selective close

Selective Close Button?

Selective close (as fitted to C and D stocks) closes 3 sets of doors in each car, leaving one set open. I believe C69 stock was the first to have this feature.

Odd things can happen if you only give the door close button a quick dab rather than pressing it in firmly.

There is no selective close facility on 1967 stock, since they were not intended for use in "open" stations in inclement weather (Yes, I know they worked on the Central for a while ...cold i bet ..no heaters either !)

There is selective re-open, operating the doors open controls with no doors closed visual indiated "pilot light" will only reopen the doors on the car(s) where they have failed to close. This can be over ridden with a plunger to release all doors on a push of the doors open buttons.

The doors of the leading car only, can be cut out from the leading cab, in case of overruns, they can be closed in isolation from the other 7 cars using this, if all the doors are open.

as ADW says, a dab of the doors open or doors close buttons will often cause a random selection of leaves to open or close. (and not just on 1967 stock)

Usual cause of jammed doors is somthing blocking the runner, a shove usually frees it, though passengers holding doors have been known to knock them off the runner and get the whole train withdrawn from service. Less often a single door mechanism may fail, with the locking bar in place, the door will not open no matter how much it is shoved.

Not sure that explains the drivers ability to close the doors on the front two cars only, no such facility, so perhaps this confirms there was a defect on the door control electrics for the train.