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Worcester 28i central heating system is 'kettling'

Hi there.. I have a Worcester 28i Boiler. A few weeks ago it started 'kettling' so it was drained and re-filled with a cleaning additive included. I've just fully drained the system after leaving it a week and a half with the cleaner running through it. The kettling noise had gone and it was back to running smoothly. After draining the full system and radiators, I then re-filled with an inhibitor included, but the kettling noise seems to have returned with a vengance too.!! Alll radiators are fully bled now and the system is at 1.5bar when cold, rising to 2.5bar when hot. Is there any reason the system would be ok with cleaner inside, but not after a drain and refill?? Any help would be most welcome.. Thankyou.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 13 Answers

SOURCE: Bosch boiler System

it means that the boiler wants to be serviced, the boiler will still work fine. Once the boiler has been servcied, there are a succession of buttons, that need to be pressed, to tell the boiler that it nhas been serviced. then 365days after it will do it again. Its there to prompt you, to get the boiler serviced

Posted on Mar 03, 2009

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gary1121
  • 332 Answers

SOURCE: a trickle of hot water from taps, central heating ok

it sounds like your shut off valve might be bad even though it turns on and off by turing it doesn't mean that the washer is not stuck to the seat and not opening, try replacing the valve

Posted on May 29, 2009

  • 1 Answer

SOURCE: Worcester combi boiler losing pressure & water through o/flow

having the same problem and its a new bolier. thanks , adriano.

Posted on Jul 12, 2009

mrhotandcold
  • 248 Answers

SOURCE: bled radiator and now boiler is losing pressure

if your boiler is a combi re-pressurise locate filling loop and refere to manual

Posted on Oct 11, 2009

mrhotandcold
  • 248 Answers

SOURCE: worcester oil heatslave boiler pressure rises to over 3 bar when

iif you,ve tried everythng change gauge

Posted on Oct 12, 2009

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