Central Locking - Drivers Door - Delay?

[purct]

Hi,

 

I have an intermitant problem with Central locking from Drivers door on a MK1 Galaxy(its been going on for a few months on and off). After driving, I try to lock the car from drivers door and the only drivers door locks. but there is a delay of a minute or two before the rest of the doors lock - without any further turns of the key (and the light on the drivers door doesn't flash). When I try and unlock the doors sometimes it unlocks all doors while other times it unlocks the drivers door only.

 

if use the passenger door to lock the car, it locks all doors accept the drivers door. again when this happens the flashing light on drivers door doesn't operate.

 

 

if I wait serveral hours after driving and then try to use the drivers door, it operates as expected (but sounds like the battery is almost flat as the central locking operates slowly) if I operate central locking from the passenger side it appears to lock/unlock without issue.

 

as I say the problem is intermitant but now appears to be more often than not, Any ideas on what the problem is?

 

thanks in advance!