"Marcus Fox" wrote in
message ...
Newly fitted GFCH system with Glow Worm 24cxi boiler. CH is fine, the hot
water (with the boiler on the recommended ECO setting or even turned up to
maximum) will be at a sufficient temperature downstairs, but for the two
hot
taps (sink and bath) upstairs the water only comes out lukewarm, even
whilst
running the tap for a while, the temperature remains constant. Also, if
both
these taps are turned on fully, the water will only come out of the bath
tap, which is the lowest fitted. What could be the problem, and how to
rectify?

Marcus



Sounds like a mains pressure problem. Is the cold tap giving a decent
delivery? What flow-rate are you getting?
Also, what is the temp reading on the boiler during DHW demand? If you have
a thermometer, mesure the temp of the mains cold and then the hot, you
should be getting at least a 40 degree rise.

Who installed & commissioned the boiler?

Angus