Hot Water

[fruitsalad]

The (suppose to be) hot water from my shower, comes out luke warm, but from the basin it's hot, can anyone tell me what the problem may be.

[nicebloke1]

Electric or one working off boiler without that info????

[fruitsalad]

It's a tank and immersion heater, it heats the water overnight

[Atheist]

Do you have a thermostatic shower mixer valve?

[nicebloke1]

Very possible that the cartridge on the shower needs replacing. The cartridge regulates the temperature of the water coming out of the shower regardless of how hot its going IN. other than that I cant help any further.

[The Builder]

Mixer valve possibly. Either faulty or something has got into the valve and partly bunged up the hot side.

Gravity systems can get this problem since there's little pressure to blow out anything that gets into the system. I'd start by disconnecting the hot feed to the valve to check the flow. All kinds of debris can get in via the roof tank. If that's clear, then it's most likely the shower valve become faulty.