HELP please cant unlock 106 front doors!

I’ve got an old 106 that we cant unlock the front doord on, its been
standing for 3 months so they may have seized but it feels like
something is preventing the key from turning to unlock door.
immobiloiser is fitted but car starts (after clambering thriugh boot
and over seats) boot hatch unlocks/opens as do rear doors, although no
key is needed there. have tried interior pull up knob and have sprayed
everywhere with relesasing spray but still no joy. there is no central
locking as far as i know.
just wondering if anyone knew what problem is before i make a fool of
myself at local garage!

 

First off make sure that you have turned the key in the door to the open
position, then climb inside, hold the door handle inside as if you were
about to exit the car, now for the fun bit, while doing this bang your
shoulder into the door a few times and if you are lucky it will open. I have
a Citroen synergie and the doors on that seem to stick themselves closed
sometimes within a few days of not using it.
I like you have oiled and wd40'ed silicone greased it but it still seems to
be able to stick shut within days. Gentle pressure from the inside might
just do it .
I had a 505 estate many years ago and the sunroof on that was a slide back
type and that would stick itself stuck on the rubbers and would need you to
climb in the back put your feet on the back of the seats and pull like mad
to open it.
GGJ

 

If the mechanism's like the one in the 205 there's a spring that fails
so one of the linkages sticks halfway. If you can get the door panel
off it needs to be pulled downwards. I fixed ours using an extension
spring and a length of steel wire to one of the holes in the bottom of
the door used to attache the panel.

If it feels like it's unlocking though (especially from the inside) try
a good hard push from the inside while pulling the handle - the grip on
the door seals when they get stuck (especially iced up) has to be seen
to be believed.