Lukewarm water for the bath, all other taps hot...

Hi All

There are many similar posts to my problem but none seem to be identical nor do the answers seem to apply to me so here goes...

I've a Heatline C24/28 Combi-boiler (fitted in May 07) in my flat, I get perfect hot water in the kitchen (where the boiler is situated) and in the bathroom sink but only lukewarm (at best) water from the bath taps.

I've touched the HW outlet pipe for all cases, and the temp of the pipe is significantly cooler when the bath taps are on compared to the kitchen and bath sink.

What's stopping the boiler from heating the water for the bath to the same temp as the kitchen or bath sink? I'm puzzled as it's all off the same feed...?

Let me know if you need any more details - thanks for your help

Hmmm, I wonder how many are going to say its likely the diaphragm in the diverter valve?

The most likely thing that can cause the temperature to change is a change in flow rate through the boiler.
Are the kitchen and bath sink taps just more restrictive?

Try running the bath tap more slowly and the water temperature will rise.

original 22mm pipe to bath taps perhaps!!!

is this similar to your tap