hi guys any help or advice would be good, I have a Ariston Clas eco he 30 combi boiler it’s only 9 moths installed but just noticed that it occasionally calls for heat if just after the cold water tap is closed it’s litteralky a second the icon for head comes on n then off I’m assuming that’s not a normal function I know you can hear the valve open n shutting but the brief signal for heat isn’t normal is it plus will it be doing any harm to the boiler?
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Boiler briefly calling for heat after shutting cold water tap
- Thread starter Robert Anderson
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View the thread, titled "Boiler briefly calling for heat after shutting cold water tap" which is posted in Boiler Advice Forum on UK Plumbers Forums.
Fit a double check valve on the cold supply to the boiler with a mini shock arrestor between to protect your boiler this will stop it . cheers kop
Cool thanks any idea what will be causing it I didn’t have the issue on my previous boiler? And will it do any damage if left?
Also think there may be a double check valve fitted
Scott_1979
Gas Engineer
Dead leg on the cold, mine does it. Haven't got round to sorting it yet!
Where would/could that be? And will it do damage if left?
You possibly have some poor pipework somwhere ie a section capped off leading off a tee , some boilers do seem prone to this . If you cant sort the pipework a mini arrestor should sort it .
The flow switch in the boiler is sensing movement of water in the supply which feeds the boiler stop that and it will sort the problem out , a mini arrestor protects components on the hydroblock within the boiler personally i would get it done under a £100 fix , get a leak inside the boiler it could be very expensive. Cheers kop
Guys just an update in case you were loosing sleep basically it was what was expected deal leg where old cylinder was my neighbour is a plumber but we would need to lift floors to get all the old pipe out so he stuck a fitting on n bled it as was full of air n boom all good no longer is it asking for heat, thanks for all the help guys
IT will end up with stagnant water inside it other wise.
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