Central locking problem: locks and unlocks again

[chevrolate]

[AVEO 5 LS 2008] Central locking problem: locks and unlocks again

Hi all!

Well, the title says it all. A couple days ago I realised that my car was unlocked and I found it odd, once I remember to lock it. Then I locked it again with the FOB and it locked, but unlocked again like a loop. I checked if there was an open door, but all doors were properly closed.

I didn't find any related issue on the Internet (found many problems with central locking but none of them were the exactly the same or with the same cause, I think).

Symptoms:

• Door locks and unlocks if I press the FOB lock BUTTON
• Does the same if I use the key manually (both keys)
• It locks without problem if I unplug the central locking fuse
• I can't press the door lock down if the door is open (I am not sure if it is supposed, to be honest. But I can do it on the other doors)
• I can press the door lock down with the door locked. However all the doors lock (ok) and unlock again.

I already did:

• Disconnected the battery for 1 day. Battery is full charged.
• Check the fuses (they're ok)
• Disconnected the door lock actuator and cleaned the connection with contact spray
• WD-40 (Because... Why not?)
• Replace FOB battery