Boiler briefly calling for heat after shutting cold water tap

[Robert Anderson]

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?

 

[king of pipes]

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

 

[Robert Anderson]

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?

 

[Robert Anderson]

Also think there may be a double check valve fitted

 

[Scott_1979]

Dead leg on the cold, mine does it. Haven't got round to sorting it yet!

 

[Robert Anderson]

Where would/could that be? And will it do damage if left?

 

[townfanjon]

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 .

 

[king of pipes]

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

 

[Robert Anderson]

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

 

[AWheating]

dead legs on cold / drinking water really should be removed.

 

[Harvest Fields]

dead legs on cold / drinking water really should be removed.

IT will end up with stagnant water inside it other wise.