Re: climate control and central locking
fan is probablt the fan itself, seems to go on quite a few cars, but it is worth checking the fuse/relay/wiring before replacing as it is a pain to get to (and the aircon has to be de-gasses). Take off the cover in the centre of the bulkhead, about 12in wide and 3in along, secured bt two screws, under there lies the relay and fuse, check they are ok.
The central locking sounds less straightforward. Is your key one that has two buttons, car and boot or kust the one? The central locking motors are crap, mine had three broken on the car, then the boot one packed up, or it may be the central locking brain thing that has gone.
Does the boot release botton in the glove box work? if so it may something to do with the brain, if not it is most likey to be a broken the wire in the boot. The wires pass through a rubber hose near the hinge on the left side, and one inside will break over time as it bends back and forth, again a fairly common fault.
In summary need to find out if you have a full collection of common broken locks, or a new as yet connected fault.
Which 02 plate car is it, the black 2.5 with facelift wheels?