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Home > Heating, Home Heating Systems > Question
heating, home heating systems, central heating, heating, cold, heating system, radiator

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Heating
Convector Heaters
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Oil Filled Radiators
Worcester 24i boiler problems?

The pressure on my Worcester boiler goes up by a bar when the system heating is on. This happened after the boiler was inadvertantly drained fitting an extra radiator. However, i have drained air from the boiler (there is a bicycle pressure valve at the top of the heating coil).

Apart from the varying pressure the boiler works perfectly and heats the water normally. I presume their is still air in the system.

How do I get it out?

Julian
November 2006

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hi when hot taps are turned on the water gets hot then after about 30 seconds it goes cold again thanks

nigel
March 2014
We have a Greenstar 24i junior Worcester boiler. When we switch it on the green indicator light comes on and the blue mains on/off indicator light also comes on but after a few minutes the indicator light flashes on and off then the blue light and reset lights start flashing, somestimes the sequence is: red red blue and other times its red blue red blue. I've pressed the reset button umpteen times and the whole process repeats itself. The radiotors keep going off unless I press the reset button but it only lasts for about five minutes before it starts flashing again. The button with the little spanner symbol is also lighting up now and again. There is also a loud banging noise coming from the boiler sometimes when I press the reset button. We have phoned the Home Care number and they are shut until Wednesday 29th December! Is it best to switch the boiler off or leave it on with the reset button flashing so that the pipes don't freeze up?

Jan
December 2010
I have a worcester 24i combi and the boiler locks-out after the heating has ran for 10 mins

Charlie
December 2010
Our pipes keep making funny noise like there are vibrating tried bleeding but it still making the noise. Help

Fay & Paul
December 2010
see posting by adman

Your Plumbing
December 2010
hi my heating wont come on, when i switch it on nothing happens........ the hot water works fine you can hear the boiler fire up. the gauge is at 1 bar i tried to bleed the radiators and water came out straight away, so no air in there.
could it be the thermostat or an electrical fault????
there is a reset button on top but you cant press it in ??

the boiler is about 10 -15 years old.

help!!!!!!!!!!!!!1

pete
October 2010
help my combi 24/28i boiler fires up but due the pressure driopping everyday cuts out and radiators are cold. there is also a pipe from the boiler dripping what is up with this??????? also the red light is not flashing so no indication of a fault

boomer
October 2010
you have released air from the wrong place. that valve is part of the expansion vessel which needs sufficient back pressure in it to allow the system to expand and contract. thats why your pressure rises dramatically when hot. what you need to do is find out what the pressure needs to be in the expansion vessel (poss about 1 bar)and get someone to isloate the boiler and drain part of it and then (with a car foot pump) replace the air that you have released. then refill the boiler,bleed all rads and fire her up!

adman
October 2010
please help there is no hot water control on my new flat, i'm getting scalded by the shower and if i turn it down i lose too much pressure and it goes cold, its a mains fed shower (not electric) any help would be good

melted welly
August 2010
the pressure on the boiler stays between 2-3.5 bar and occaisonally rises above this. The problem appears to have started when the bathroom was refitted and the plumbers switched the pipes so that some of the heated water passed through the boiler a second time causing in to switch on and off frequently. The problem has been solved but the pressure problem still remains.

Hendry
May 2010
can someone help..? Why does my 28i Junior Worcester boiler fire up when the heating switch is off?

Jo
April 2010
Have just bought a house & moved in today. The Worcester combi boiler which was only installed 1 year ago was serviced & certificated 2 weeks ago but does not work! When boiler is turned on it starts, but after 2 minutes it stops & the reset button flashes, so no hot water or central heating! Please can someone help us?

Paula Eastick
April 2010
the pressure rise is due to heating water expanding,this is not a problem and will always happen

duff
February 2010
why does my 24i junior fire up at random times when it is on timed?

gina
January 2010
anyone that has trouble with the guage dropping, you want to basically, stand in front of your boiler and if you see a sliver pipe that flexi with a little black plastic peice and turn that black peice and you hear hissing as it lets water through, and watch as the pressure gauge slowly goes to the recommended pressure between 1 and 2, now if it keeps dropping constantly then you losing pressure somewhere along the system so you better off calling a plumber. I put it in simple terms for all to understand.

The Lady Plumber
January 2010
My boiler will not turn on, when you flick the switch it does'nt want to start ! Befor i could turn the hot water on and run it then the boiler would kick in but now there is nothing ! any help would be great!!!!
Geoff.

Geoff
January 2010
the pressure gauge is at 0, what should i do

nicole
September 2009
lol, reading the instruction manual is a definate even for us gas safe registered people. just some tips for you if your draining your sytem agen, make sure you drain it through the drain off (usually at the lowest point on your heating system by a radiator) DONT USE THE BLOW OFF INSIDE THE BOILER!!! u will find yourself having to replace it coz it wont seat itself properly again and jus drip causing pressure t drop constantly, good look or jus ring an engineer before you have to fork out 850 for a new one coz uve broke it

sam
August 2009
pilot light has blown out

j mahon
May 2009
will not start up no hot water or heating. do i need new boiler

dean
May 2009
how do i bleed the radiators on a worcester 24 si

shane
March 2009
the pressure on the pressure gauge is falling

singh
February 2009
does this boiler have a pilot light we cant see if it does

valerie samantha
February 2009
i have a worcester 24i, the thermostat reset switch on top of the unit keeps tripping out.
Any ideas?!

brettster
January 2009
It fired up this morning for central heating but then did not subsequently come on for hot water and cannot get it to fire up. I have tried switching off at mains and turning it back on but this has had no impact. The boiler when it is not being used has 0bar but this rises when in use to about 1 bar.Any ideas?

Justin
December 2008
when heating goes on expansion from the heat in the water can rise it to a bar of extra pressure

kevo
December 2008
you should have read the instructions before messing about with it. you have let all the air out of the expansion cylinder. The pressure keeps going up as there is nowhere for it to expand into now. You should remove the water pressure via a drain valve and pump up the expansion vessel (yes the bike valve on top of the red cylinder at the top) up to 0.5bar the n refill the system with water back up to 1bar. If in doubt read the instructions. http://www.worcester-bosch.co.uk/index.php?fuseaction=site.viewFile&id=9935

Paul
November 2006

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