I have an RCD board with six other switches. Every six months or so, my electrics stop working and trip out constantly for several days before appearing to sort themselves out.
At the moment, they are not working. This is the issue:
I have tried putting the RCD to an 'on' position, and something this works and sometimes it doesn't. When it is on, I can turn on some of the other switches but often they trip it immediately.
I have tried unplugging every appliance but this has made no difference.
If I leave the fuse board all switched off for 30 minutes or so, I can switch it on and it will stay on. However, sometimes it will trip if I switch on something - which could be bedroom lights, tv, kettle (all on different loops).
I'm beginning to think that there is something that gets hot and it needs 30 minutes to cool down - however, I don't know how to identify what this is. And I don't understand why I have the issue every six months or so and it works perfectly inbetween.
Also, it can trip in the middle of the night (as last night) when there is virtually nothing on.
I've had a selection of electricians out but none have come up with an answer....
Any ideas very welcome!!