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How do you change the pressure on a greenstar 28i junior bosch combi boiler?

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: My Worcester Bosch Greenstar Combi

just had same problem.  this apprently happens if the power supply has been interrupted or you switch the power on and off.
• The boiler runs for 15 minutes at minimum heat output to fill the condensate trap, the display (K) alternates between -II-” and the boiler flow temperature. This occurs every time the mains supply has been interrupted.

Posted on Jan 07, 2009

burty681
  • 56 Answers

SOURCE: Good morning. I have a

it could be the fan or the pump best thing to do is disconnect fan and start it up and if it does not blow that the problem

Posted on Feb 04, 2011

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Apr 07, 2013 | Water Heaters

1 Answer

Good morning. I have a Bosch Worcester Greenstar 28i Junior. As the fan statrs up the mains power trips out. Is it the fan at fault or could there be another/different fault.


it could be the fan or the pump best thing to do is disconnect fan and start it up and if it does not blow that the problem

Feb 04, 2011 | Heating & Cooling

1 Answer

Worcester bosch greenstar junior 28i approx 2 years old. timer is not working it does not fire up at set time could it be something simple or do i need a new timer.


Hi, this is Worcester, Bosch Group.

Our technical team can help with enquiries - please call 0844 892 3366.

We look forward to helping you.

Mar 29, 2010 | Heating & Cooling

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Central Heating\which combi boiler?


HI right first i would look at a worcester greenstar combl
best you can get and you have full back up from worcester leave all rads with stats as they are i think you will have to remove one , the that would be the bath room also the greenstar comes with a clock bulit in these are on the worcester bosch web site i have been a gas fitter fot 30 years and this what i would go with a really good combi, you can also get awire less room thermostat for this hope this helps

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Worcester greenstar hot water fluctuation


the limit stat could be out of calibration, low water rate, by/pass if fitted may need reculated, could be blocked heat exchanger best of luck

Mar 03, 2009 | Water Heaters

1 Answer

Repressurizing my boiler


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
https://www.youtube.com/watch?v=K6fH4XfGgxo Nov 10, 2012 - Uploaded by Rory Macfarlane
This video demonstrates how to repressurise a Worcester combi boiler on the.

Product Troubleshooting Videos ' Worcester, Bosch Group

https://www.worcester-bosch.co.uk > Support > Troubleshooting > Videos How to repressurise a heating system with an internal filling key ... how to repressurise your heating system using your Greenstar gas boiler's internal filling key.

How to top your Worcester combi boiler up - Gas Care.

www.gascare-heating.co.uk/topping-pressure-worcester-bosch-combination-boiler/ Aug 4, 2014 - If the needle on the pressure gauge on your boiler has gone into the red or down to zero it means there is little or no pressure left in the heating system and it needs to be topped up ASAP. So here's Gas Care Swansea's guide to refilling your Worcester Bosch combination boiler through the internal filling link.

How do I re-pressurise my Worcester Bosch boiler? - My Plumber

www.my-plumber.co.uk/blog/how-do-i-re-pressurise-my-worcester-bosch-boiler/ Sep 1, 2015 - 6) Check the pressure on the pressure gauge. When it reaches between 1 and 1.5 bar, it is time to turn the white knob back to the right to close the valve. Be very careful not to over-tighten. 7) Turn the filling key to the left until the arrow lines up with the open padlock and remove the key.
Repressurise Worcester boiler

May 12, 2017 | Heating & Cooling

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