If you have a steady flow of water then it's fine, ie shower is ok once it's been running for a minute. But if you have to turn the tap on or off or change the flow rate then the water temerature flutuates like crazy.
Example: I just had a shave and the water was fine during the shave but when I used it to wash my face afterwards it pretty much burnt my hands. Surely there should be something to stop scaulding hot water coming out? I have the temp on the boiler pretty low, much lower and the normal water temerature is too cold, ie a bath doesn't come out hot like it should.
Any help appreciated.