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My worcester 28i11 dosnt warm all radiaters butb there is no airlocks

No air in system must be boiler fault

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 17 Answers

SOURCE: COMBI BOILER /CENTRAL HEATING

the boiler should modulate to controll the radiator temperature but the central heating will go off whilst you are drawing hot water

Posted on Nov 27, 2008

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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

  • 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: My worcester Combi boiler loses pressure over 24

check the tops of all your radiator valves for bypass if found, easy to repair best of luck

Posted on Oct 21, 2009

  • 150 Answers

SOURCE: flashing red light on Worcester 24i junior combi boiler

Pressure is ok? at 1 bar or above
I think on this one there should be a reset button [red] on the left hand top of the casing - or lower the control panel [ phillips screw on each side] and the button is on the left of the base plate. Press this and try the heating.or hot tap
P.S. if you're on a prepayment meter check you have gas.

Posted on Nov 08, 2009

Testimonial: "Thank you, very helpful advice. Still got the plumber coming to check everything over but the boiler is up and running for now. Thank you so much"

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1 Answer

How to remove airlock from hot water system


At the boiler should be a purge setup. This consists of a valve to shut the zone off, and downstream of that valve is a drain ****. Attach a hose to the drain ****, and with the boiler running, close the valve and open the drain ****. (Turn the heat up on one zone at a time if you have multiple zones.) You should be able to notice when the air comes out of the hose by hearing it and the hose twitches and jumps when large amounts of air come out. After the air stops coming out, open the valve , close the drain, flip the bypass closed, and let the water circulate, then reapeat procedure. Do this until you hear or see no more air. You can run a long hose outside or you can use a bucket and a short hose. Using the bucket allows you to actually see the bubbles of air, but you will be dumping many buckets before you are done. Most boiler feed valves have a fast fill lever that bypasses the slow 12 psi that the boiler is normally fed at. Using this will speed up the purge considerably, but don't forget to flip the lever back down between, and after purging or the boiler relief valve will blow off and make a mess. Good luck!

Mar 18, 2017 | Water Water Heaters

1 Answer

Worcester 350 combi boiler on but water cold and radiators cold. Have put pressure up but made no difference. What's wrong with it?


If the inline pump is not working no hot water will flow into your radiators. The pump pushes the water in the lines to create a water flow. Increasing the pressure will not help in this case. I recommend you put the pressure back down as it usually is preset when the boiler is installed. My pump is about three feet back of the boiler on the intake line. If you don't know what you are doing I recommend getting a repair man as you could create more problems by over heating the boiler its self and blowing the electrical parts up.

Feb 06, 2015 | Water Water Heaters

1 Answer

Thanks for that mike, it is a worcester bosch combi 24cdi heating and water can stay on for an hour then everything goes off and the red light flashes. it will come straight back on when reset, but then...


Check the pressure reading, should be about 1 bar when system is cold. Various models in the range of 24cdi. If you do not have a manual, go to,
http://www.centralheating.co.uk/Boiler-Manuals/worcester-bosch-boiler-manuals/worcester-bosch-discontinued-boiler-manuals.
Get the manual for your unit, to wards the end of install manual it has a fault finder, Also has a basic 1 in the user manual. Number of flashes how fast the light flashes which one flashing can all mean different, So get the manual and check, Some parts are easy to fix, as long as you do not touch the gas side the rest is plumbing. Come back if needed.

Mar 05, 2013 | Water Heaters

1 Answer

I have a Worcester Bosch HE system boiler. I am not getting any heating or hot water.The burner ( pilot light) is not on and the pressure gauge is on 0 bar. The boiler is about 7 years old. My decorator...


If a radiator was taken out and put back in I feel you have air built up in your system. There should; be an air relief valve on each radiator. Get your furnace up to heat and open the valve on each radiator till all the air is out of the lines. If there is air in the system there will be no heat. You do this after the heat is on. As far as the pilot not coming on you could have a bad igniter which may need replacing to get heat.

Aug 22, 2017 | Water Heaters

1 Answer

Only some rads working others warm on top cold on bottom worcester combi all the time tried bleeding rads


sludge in the rads sytem nees to be flushed out this can done by a company or drain down system and remove rads and flush out with hose

Dec 01, 2010 | Protech Systems FasNSeal FSWMKE4 4" Vent...

1 Answer

Not continuous hot water and radiators


If it has a distance from the boiler to your use the water in the lines and the lines themselves ahve to warm up before you will get hot water, Let me know more if this dosnt help. Please rate me as high as possible if it does help you understand your trouble.

May 31, 2009 | RTO Ariston Gl4.0 Instantaneous Electronic...

2 Answers

Worcester bosch greenstar 25Si?30Si pressure gauge showing high


a couple of things , is your filling loop disconected ? , and are all your radiators blead from air, have you got a high point where the air can get stuck in system say pipes going into roof etc you may need to fit a air release valve in line at highest point to remove the air from system , your boiler should be around 1.5 bar running preasure average setting . if you are constanly filling with water you could be exceeding the pressure valve limet which releases pressure from system this could be faulty ?

Feb 02, 2009 | Water Heaters

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