On Oct 26, 8:13*pm, jgharston wrote:
nicknoxx wrote:
If the water is hot at the sink then it's not the boiler or the system.
It must be the shower mixer. I've had one of those showers and it was fine.
Has it ever worked?

Not since I moved in in May. It's only now getting
annoying as the weather gets colder.

Are the hot and cold supply fitted correctly?

Dunno, can only presume that the person who built/plumbed
the house last year fitted them correctly.

Is there a blockage in the hot supply?
If you stop cold water reaching the shower does hot water come out?

Hmm. That would be an interesting experiment, though how
I would do it without ripping out the wall on the other side
of the shower or breaking up the concrete floor I'm not
sure.

If I'd plumbed it in, there'd be isolating valves on both hot and
cold. Simples!

MBQ