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  1. K

    Vaillant ecoTec plus 624 boiler

    Hi Had the above boiler fitted two and a half years ago. has worked fine until yesterday. Yesterday evening the boiler refused to fire up. Without heating last night and this morning. Now it has suddenly started working, though I think there is a slight bubbling sound coming from the boiler...
  2. K

    hot radiators when HW turned on

    I would like some advice please. Used to have an old gravity hot water/pumped central heating system, which was changed to a Vaillant ecoTec 624 with a hot water cylinder last October. Switched off the heating and and left HW on , but radiators continue to heat up. Called plumber back and he...
  3. K

    Central Heating

    I have recently had a new Vaillant ecoTEC boiler installed. All radiators upstairs are heating up o.k. Downstairs, the radiators take 2 hours to heat up. Even the radiator downstairs without TRV takes 2 hours. What is happening?
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