Central locking playing up

[Trekker]

When opening astra central locking (locks) keeps jumping up and down, any
answers to what to look at to fix fault.

thanks

 

[mikeFNB]

door switches.
each door will have a push button switch with a gator or WHY
if this is on the way out then it will cause your problem

also door lock mech may need lube.
or even lock solenoid movement or switch
mike