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hot water runs hot / cold when running bath?

ariston eurocombi heating fine but hot water cools when filling bath

pete
February 2011

Ariston Heating, Home Heating Systems Hot Cold Running Fine

hi, is this boiler very old?, poss causes..plate heat exchanger worn if old boiler, gas pressure low due to small pipe diameter,or blocked,or gas valve fault, i guess it may be time to change boiler if its over 10 years old.

peter
February 2011

Either the heating matrix is blocked with scale or the bath flow rate is more than the boiler can handle. Try slowing the flow of the tap down in slight increments until it starts getting hot. If it turms to a dribble before getting hot then it is most likely blocked.

boiler bill
February 2011

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hot water runs hot / cold when running bath?

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