Hi folks, here's a puzzler for you. My hot water runs off my combi boiler and it's really great - very hot - all over the house. My downstairs bathroom is next to the utility room that houses the boiler and the sink unit in there has a hot tap with very hot water. However, the bath hot tap - weirdly - only gives warm - not hot - water. When I run it - it does make a demand on the combi, so I'm very confused. Anyone seen this before?