No, there was nothing covering the valve. Interestingly the valve was new 3 years ago. We've recently had a baby and my wife has had the heating running almost non-stop, which may have caused the valve to become over-heated and faulty. Also, there aren't any vents on the cupboard door - my next...
Just a quick follow-up for those that offered advice, or who have followed this link. I had a Heat Engineer plumber investigate the smell. Took him a bit of time to find the source, but he found a falty hot water motor valve, allowing the valves electrics to massively over heat which was causing...
The toilet waste passes under the lobby just in front of the cupboard but not the cupboard itself (there is a man hole cover imbeded in the floor under a carpet tile). There doesn't seem to be any smell coming from the man hole cover, as the smell disappeared when I taped up the cupboard. We did...
We have a bad smell coming from our hot water tank cupboard (electric), which is located in our bathroom. It smells like a drain / smelly egg smell. No problems with toilet or sink, shower or bath draining or smelling. Water from the taps smells fine. I even taped up the cupboard door just to...