This morning, when turning on the hot taps/shower I had no hot
water. I have a combi-boiler so once I turn on the hot tap after a
few seconds I normally get the hot water coming through. It was
working fine yesterday
I did notice that even when the taps were opened up full, there was
a lot less hot water pressure than normal. The cold seemed OK.
Anyone got any ideas as to what the problem could be. The boiler is
6 years old.
Because a combination boiler works on differential pressure for supplying
DHW (domestic hot water) to fire the boiler up, then it may have just been a
drop in the supply pressure through others in the neighbourhood all using it
at the same time that caused the switching not to identify that a tap was
turned on. You may want to check that your mains stopcock, both outside and
inside, is full open, or that the pipework is not blocked or restricted
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