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28cdi

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  1. R

    Worcester Bosch 28cdi diverter valve

    Hi I am replacing suspect diverter valve on old Worcester Bosch 28cdi. There is a small black slotted screw there (see the photo). Could someone advise me what is it for, is it an adjustment? Thank you very much Rafal
  2. N

    Worcester 28cdi ii - Hot water problem.

    Hi All, I wonder if anyone could give me some advice regarding a Worcester 28cdi ii , I get hot water only at certain times when the central heating is on and even then the hot water is in short supply, there is a tank next to the boiler. Is there a way of having hot water all time when needed...
  3. D

    Worcester 28cdi (old type) Guess the Noise

    Ok, following on from my drain tap thread, does anyone have an opinion about this vibration noise. It started a few days ago there's no lockout or fault code and everything works as it should except for the noise. I fancy it's the pump but as they go for about £150 I want to be as sure as i can...
  4. D

    Boiler drain taps on Worcester 28cdi (old type) not draining

    Hi all, new to the forum, I have an old style Worcester 28cdi that I need to drain down to investigate some vibration noise. (i'll be asking opinions about that once the youtube video has finished uploading), meantime my question is; when you open the boiler drain taps, nothing happens. does...
  5. B

    URGENT Worcester 28CDi return manifold

    Does a Worcester 28CDi Combi have to be taken off the wall to change the plastic return manifold?
  6. C

    Worcester 28CDI Service Confusion....

    Hi all, i went to service one off these today but i had to abandon and say i'll be back in a couple of days. This has really throughn me badly and its the first time i've attempted to service one of these aswell so no prior knowledge. A bit of background british gas have "serviced" it for the...
  7. M

    Long term noise levels Worcester Bosch 28CDi vs 30i

    Hi Choosing a new replacement Worcester Bosch combi boiler - both are about the same price. Anyone have experience of what the noise levels are like - the WB website says 52 decibels for the small one and 50 decibels for the larger - but what are they like in real life over the longer term...
  8. S

    Worcester 28cdi pressure rise.

    Worcester 28cdi pressure rising over 24hr period from 1 bar to 2 bar when nothing running...? Filling key left out. I'm thinking heat ex. Anyone else had anything like this?
  9. Lambed84

    Worcester 28cdi rsf misbehaving

    Does anyone know if the venturi that sits in the fan is plastic or metal?
  10. Super Mario

    Worcester 28cdi pressure guage up and down hot water intermittent

    Prv was leaking so ive replaced that was at 1 bar keeps goin up to 3 bar making banging noise hot water intermittent going luke warm any ideas cheers
  11. C

    Space to replace a PRV on a Worcester 28CDi

    I'm replacing the PRV on a Worcester 28 CDi, but the space between the red cap and the side of the boiler housing is only about 5mm. The o-ring PRV body is inserted approximately 12mm in to the clipped housing. Does it slide out when the union is unbolted or is there further dis- assembly...
  12. F

    Worcester 28CDI MKII RSF problem

    Hi all, I'm looking for some advice. About 18 months ago we purchased a house that had this boiler already in it, on completion we wanted it serviced, saw it was old as far as boilers go and it was. Had no problems with the boiler until it was serviced in December just gone. Something that...
  13. P

    Worcester 28cdi rsf vertical flue instructions

    Hi guys Went to look at a Worcester 28cdi rsf today. G.C 47 311 34 The vertical flue doesn't quite look right to me, as in doesn't look like a Worcester fitting. But I can't find any instructions for the vertical flue and it's not in the boiler installation instructions. Does anyone know...
  14. J

    Worcester 28CDI fluctuations in pressure and leak

    I have a Worcester 28CDI and recently I have noticed that the pressure is going from 1 bar cold up to the maximum 4bar within 20 minutes when turning the central heating on. There is also water leaking from the bottom of the boiler. The heating and hot water seem to be functioning fine. I've...
  15. U

    Worcester 28CDI fluctuations in pressure and leak

    I have a Worcester 28CDI and recently I have noticed that the pressure is going from 1 bar cold up to the maximum 4bar within 20 minutes when turning the central heating on. There is also water leaking from the bottom of the boiler. The heating and hot water seem to be functioning fine. I've...
    • Unregistered
    • Thread
    • 28cdi boiler central heating system leak pressure water worcester
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  16. Hobo128

    Worcester 28cdi

    Called out to a worcester 28cdi ( not greenstar, old one with grey front) making a strange noise, little bit of banging etc. I think it's the pump, turns out that the pump only works on speed 3 and if you turn it to speed 2 or 1 it stops and obviously starts banging loads. Obviously there is...
  17. A

    28cdi combi with f and e

    Hi guys, been out to this boiler, it's a combi but it's not a sealed system it's tank fed. never seen this before. customer has complained that hw is intermittent. Colleague of mine has said change the plate. I'm not entirely convinced, went through fault finding, checking pressures and...
  18. M

    28cdi weird fault.

    So I went out for a service a week ago and they said it stops working and the hot water light flashes (air pressure fault). I wasn't 100% certain what it was I narrowed it down to the fan slowing down for a split second when it gets hot or the aps drops out for a second and it cuts out...
  19. J

    worcester bosch 28cdi (old boier) cold water feed inlet filter

    Hi I would appreciate some advice as my boiler has a small leak from cold water feed at the back of boiler. The bit where the copper pipe feeds into the cold water inlet filter. Is it possible to fix this easily myself, or how much would it cost for a plumber to fix. Thanks jim
    • jimmaynard
    • Thread
    • 28cdi boiler bosch casing cold cold water filter gasket inlet water worcester worcester bosch
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  20. B

    28Cdi Hot Water Temp Increasing Before Shutting Off

    Good evening all, New joiner here and hopeful that you may be able to offer some advice regarding my 28CDi. THe CH side of things is fine however when there is a draw on the hot water the light turns on and you can hear the burners starting and then the water temp keeps rising irrespective of...
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