DIYbanter - View Single Post - Ariston Combi-boiler technical question

Andrew[_22_]

On 14/01/2016 17:52, wrote:
Hot water getting red hot at sink next to boiler but only just above cold up stairs any ideas

Have you just moved into this property ?

If so, are you sure the upstairs hot tap really is the hot tap, and not
the cold tap with the wrong cap ?. If it and the downstairs hot tap
really are connected to the hot water output of a combi then turn on the
upstairs tap and shout down the stairs for some one to turn on the
downstairs hot tap full blast. You should notice a reduction in flow
from the upstairs hot tap.

If there is no obvious drop in flow, then do you still have a hot tank
connected as a heating zone ?. Not everyone removes the hot tank
especially if it is a larger property and teenagers are resident.