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Need to repressurise my worcester 28si combi boiler

Dont know what to do with the key

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Most worcesters have n internal filling loop, depending on which one you have i.e CDi (left hand side, or Greenstar/ junior (high efficiency) right hand side, there ill be a void, the filling loops are black plastic with either a small grey or white knob, position your filling key pointing up, with the little noggins poiting at 3 and 9 o'clock, so it looks like your putting the key in on the wont almost. Push it up, and twist. (older worcester turn it 45 degress), newer worcester turn to the right slightly, you'll know if its in right because you cant turn it any further on the newer ones. turn the small knob anti-clockwise to let water in, unitl the reuired pressure is reached. Normally 1- 1.5bar is adequate. If you key isnt in right water will come out where the key is. So if it does it means the key isnt in right, dont panic, turn the knob off and try again. Once done, twist key back to its original position and pull out, youll probably gets a few drip out, this is normal.

Unforuntely not the most user friendly of devices if you dont know what your doing.

Good luck

Posted on Jul 10, 2009

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Posted on Jan 02, 2017

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take your pick from video or text

How to Repressurise a Heating System with an Internal Filling Key ...

? 3:30
https://www.youtube.com/watch?v=zUsBw1ZpiKY
Oct 27, 2010 - Uploaded by Worcester, Bosch Group
This video shows you how to repressurise your heating system using your Greenstar gas boiler's internal ...

Repressurise Worcester boiler - YouTube

? 4:12
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