The Central Locking Relay is part of the car electrics system. We have 2 associated problem symptoms connected to it.
When pressing the central locking button on the keyfob the doors don't unlock. The button doesn't seem to do anything, there's no sound from the locking system. The battery in the key is ok.
The central locking mechanism doesn't always work, sometimes it can sound like it's trying to unlock/lock the doors but it doesn't work.