I've been decorating my upstairs master bedroom for a few weks now amd during that time the radiator has been off the wall, with the valves left in situ on the feed pipes at floor level. On thursday the thermostatic valve decided to open and dump water everywhere. I don't know how long it was before it was discovered (the neighbour noticed water coming through his ceiling!) but I was 3 hours away when I was told, and so had to get a friend to try and stop the water. He did, and told me that the water was pouring out of the valve itself, and not (as I assumed) the join between valve and pipe. So I have ruined carpets downstairs, and I think the ceiling will need replacing :o(
The thermostatic valve had been closed (obviously!) so why did it open? Would it have been the 'frost' protection kicking in? If so, why did it pick the day I was away to do so, as there had been colder days the weeks previous? Is this how the frost protection works, ie opens the valve if the temp drops to a certain point? If so, why didn't it close again?
Or could the valve had just 'failed'?
All thoughts welcome TIA matty