worcester-bosch 24i combi boiler

Discussion in 'Other discussions' started by gerryg, Oct 6, 2007.

  1. gerryg

    gerryg Well-Known Member

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    now got a problem with my shower after having the above boiler installed.
    before getting boiler installed i checked with shower manufacturer to make sure it could be used with a combi boiler, they and the boiler installers said this would be ok as long as it is " balanced correctly" whatever that means.
    Shower has never really been right, seem to have trouble getting any hot water through it, the hot water does come but then goes cold again for long periods of time.

    Does anyone have any idea what may be wrong.Should I be calling out the company who installed the boiler? Any info would be gratefully received.
     
  2. kermit

    kermit Member

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    What type of shower is it? It should be a thermostatically controlled mixer type. The main problem with a combi boiler is the hotter the water gets the lower the flow rate through it. If you can give any more info I might be able to help more.
     
  3. gerryg

    gerryg Well-Known Member

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    thanks for reply.the shower is a Bristan Collonnade. To be honest it seems to have corrected itself, dont know how, but definitely better than it was, maybe the pipes needed time to adjust or something. Dont know if you are heating engineer but another slight problem is that when the boiler starts up there is a low vibrating sound coming from it.this settles down once the heater is up and running. The low vibrating sound( it wakes my daughter up) stops if i lightly put my hand against the casing of the boiler.It is obviously caused by some pipe or valvue within the boiler vibrating against casing.
    Should I get the heating engineers out who fixed the boiler to have a look at it, or is there something simple I can do, as it stops as i said as soon as i place my hand on the casing to stop the vibrating.

    Any info much appreciated.
     
  4. kermit

    kermit Member

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    Hi, sorry for the delay in the reply. Been mad busy. Bristain are one of the better makes of showers, I've not fitted your model myself and can't find it on the bristain web site. A common problem on the temp side of things is the temperature regulator may not have been set or could have stuck if the problem has corrected itself.

    Another problem could be if the combi was fit to replace an old system of an indirect boiler and hot water tank. The pipe size for the hot water side of things in the bathroom would be 22mm. This would aid the gravity feed. The combi gives hot water at near mains pressure so 15mm is adiquate to maintain the pressure. 22mm could cause some pressure drop but hopefully the shower is a pressure regulating one to balance the hot and cold.

    The vibration of the boiler sounds like the outer case may not be located properly or on quite square. There only fixed by locating on clips at the back and a couple of screws for fixing on the front behind the drop down panel.

    Hope it helps.
     
  5. jennyhicks

    jennyhicks New Member

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  6. cbrpaul

    cbrpaul Well-Known Member

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    a common problem with mixer showers and combi,s is ,

    The combi struggles to push to the water out with the combined pressure of the cold water in the mixer shower , as the hot water from the combi is not leaving the shower mixer or pipes freely and fast enough the water temp inside the combi hits max so the combi will halt the burner , as its meant to , hence a hot and cold shower !!
     
  7. merlodlliw

    merlodlliw FTA only,sky free home

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    Occupation:
    H&S advisor to Charities,semi retired,busier than
    Location:
    bwlchgwyn, 1375 Ft,highest village in Wales,Wrexha
    I have a Worcester bosch heatslave 65, put on a shower myself, the feed is
    down to the shower, not fed up, never had a problem.(boiler upstairs,shower
    on lower floor.

    I agree some of my pipes are 22mm as a result of change from gravity feed.
    however alls well now , after the flow from hot water to CH, had a fault and would not switch over, after a couple of call outs, W B admitted all boilers from a certain batch had the faulty part(after a year it showed up)managed to get my money back for the call outs, I am sure the part replaced(electric) had the gate sticking to hot water, anyhow a phone call to W B is always met with excellent service. W B engineer had been told to keep the fault quiet, but said over 100 had complained, he said he could not understand why WB had not done the proper thing and changed
    all customers valves, because the lot in that batch would eventually fail.

    Bob
     
    Last edited: Jan 8, 2009
  8. victorsj

    victorsj New Member

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    Hi, I have this Bosch boiler which has been fantastic. I have now started to experience a fluctuation in the water temperature. Sometimes when I try to fill the bath all I can get is luke warm water or cold water but at other times it seems to be not too bad. Is there something on the settings which need adjusting - I have just requested a service anyway from Bosch, will a service sort out this probelm for me? The shower head, which I run off this combi boiler via the taps over the bath, has become a nightmare I have to turn the tap on full to get some sort of hot water - before I just turned it on half way round and the water was plenty hot enough.
    Any ideas would be appreciated. Thanks
     
  9. merlodlliw

    merlodlliw FTA only,sky free home

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    Occupation:
    H&S advisor to Charities,semi retired,busier than
    Location:
    bwlchgwyn, 1375 Ft,highest village in Wales,Wrexha
    What price are you paying for the service?, when I thought I had a problem, WB quoted me £210 which incluides call out and any parts
    plus call back if not fixed in 30 days. I dont know the service price, but I bet its over £100?. Anyhow is the CH OK or is that on the blink, I have two temp switches for CH and hot water, perhaps if you have the same
    one may be on the blink,

    1. is the pressure Ok, look at the dial it should be at one bar if cold,then rise to 1.3 or 2 bar when running the hot water have a look, turn up the water temp switch.

    2.Do you have to keep recharging the water pressure?

    3. Mine is a oil heatslave combi (12 years old), the hot water on middle setting is very hot in the shower.

    4.The mains water this time of year is very cold anyway,

    5.Dont forget WB have already taken any costs from your card, it is
    a naughty way they do this without telling you, my bank told me on the
    debit card I have, WB have called £210 before the visit, I have this arrangement with the bank for mystery charges.

    6. before you spend a lot of dosh, it may well be the shower head,if this is
    adjustable for temp, try this first.

    7.A service wont solve your problems, a service will just clean the soot,
    and if oil change the nossle on the pressure jet area. So check the
    areas I have quoted first. The engineer will know if there is a problem without letting on, if its WB faulty parts, I found this out from web sites years ago.



    Bob hope this helps.
     
    Last edited: Mar 8, 2009
  10. traceydylan

    traceydylan New Member

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    worcester bosch 24i has had nothing but trouble with this boiler it keeps flashing fault so just shuts off have to wait some time to get it back on but other times have to call british gas cover they have been out numerous time can anyone help it is the same every winter.
     
  11. reddiesel

    reddiesel Moderator Staff Member

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    It could be a low mains pressure problem, if you have british gas cover call them out and talk to the engineer, ask questions, what needs to be done to stop this keep happening, it could be down to your water company or council to replace pipes etc to your home for instance, it could be just down to bad luck with various boiler faults, but they should have a record of whats been replaced etc so would be best to answer questions.
     
  12. gerryg

    gerryg Well-Known Member

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    it will be your condensate pipe(i think thats what its called) there should be a white plastic pipe leading from your boiler to outside. This pipe has frozen up and causes the boiler to flash and also reset button to flash. It tries to fire itself up when you press reset but eventually the blue light on it starts flashing again. This happened to me on xmas eve and wb had a recorded message on their helpline stating that this would be probably be the problem. It was. I actually just sawed my pipe in two above where it had frozen. Although my pipe is not leading to a gutter now it has solved my probs and for all of the water that comes out of it then it is hardly a problem.

    Out of interest how much do WB charge for a service to be done?

    And if you do not get a regular service for your boiler does your warranty still stand? Any quick info qould be appreciated
     
  13. sauce_head

    sauce_head New Member

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    HI everyone,

    I had hot water issues with a 24i, the water would be hot and then go cold. I took the flow restiction o-ring out of the shower head and now the water never goes cold, however it does become luke warm.

    Does anybody know how i may be able to keep the initial hot water for the duration of the shower? The water goes luke warm after about 2 to 3 minutes.
     
  14. Cushie

    Cushie New Member

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    I hope I have the right idea in posting to this thread. Please advise if not!


    I have problems during a very cold spell of a sticky bearing on the Worcester Bosch Cd24 fan assembly (Sifan 0226-016). The immediate problem means that as the flue fan does not spin up from cold and so the safety cut-out stops the boiler firing up. (flashing red light alert)

    The immediate solution was to spray WD40 on the exposed part of the bearing and spin the fan free. There after that all would be ok for a week until the next cold spell and a repeat of the fault. Throughout the winter I dare say it failed up to 6 times however there have been no problems since. I could replace the fan (£100 !) or try to replace the sticky bearing.

    Any advice here re bearing/lubrication/fan/replacement parts would be most welcome.
     
  15. gerryg

    gerryg Well-Known Member

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    same thing happened to me during cold spell earlier this year. What is wrong is the white plastic pipe that leads from your boiler to outside the house has frozen up, this in turn stops the boiler from firing up after it automatically cuts itself off. It sounds like all the ice inside the pipe has melted and that is why the boiler is working again. ou do not have to buy any parts for your boiler but if you put some lagging on your pipe outside the house this should stop it from freezing up again.:righton:
     
  16. imported_Newbee

    imported_Newbee Well-Known Member

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    Hi there, when it comes to fitting a condensing drain that has to go outside you must use a larger than normal pipe to lessen the risk of ice blocking the drain.

    Cheers
     
  17. Cushie

    Cushie New Member

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    Thanks for your response Gerryg, I was aware of that one and did add some insulation to the drain and will keep an eye on it. The real fault I believe is a sticky bearing at low temp which once freed up (in the cold) the boiler does start as normal.

    >> you must use a larger than normal pipe to lessen the risk of ice blocking<<

    Thanks Caravan, you suggestion is valid and I dare say plastic would be better than copper.
     
  18. Cushie

    Cushie New Member

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    Any guidance on replacing bearings to fan or correct lubrication to bearings suitable for cold weather weather would be appreciated.
     
  19. johnrambo

    johnrambo New Member

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    hi there after a quick read u cant replace the bearing on a fan but u can remove the fan clean all the fins inside the fan and spary it with wd40 or some oil
     
  20. Cushie

    Cushie New Member

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    Thanks, Johnrambo, I must attend to this before the 'cold' season. I don't know why I can't replace the bearings but once I've got the fan dismantled I suppose I'll find out. I will try and avoid a new fan because it has been no trouble fro the last 6 not so cold months.
     

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