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worcester

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  1. A

    Worcester boiler blue light on

    Good morning everyone, I woke up to find the radiators unusually hot. Went to check the Worcester 30Si and the blue light was on even though no demand (fire symbol) was showing. The room temperature was well above the room thermostat (Honeywell, wired) setting. Hot water is fine. Tried...
  2. D

    Worcester Bosch 32CDI . lots of air in Rads but no drop in pressure? please help

    Hi, i hope you can shed some light on this , Combi Boiler is located in the loft and was installed March 2020 on existing pipe work/ radiators , i topped up (2) radiators up stairs in October 20 it took a lot of water! Boiler pressure is set to 1.5 bar (cold resting) and never drops. But found...
  3. M

    worcester greenstar 34cdi classic heating.and hot water issue

    I have a worcester greenstar 34cdi classic, the problem is when the heating is on and I switch on the tap then the heating switches off for a little while and heats up again by itself, what could be the issue
  4. DaveMargetts

    Worcester Greenstar 24i issue

    Hello - just wondering if anyone has any ideas why my Worcester 24i combi boiler doesn't heat the central heating water? It heats the tap water just fine but when the demand comes in from the room thermostat for the central heating to turn on - nothing happens... I've checked the demand from...
  5. P

    Worcester Bosch Greenstar CDi - injecting additives

    Hi, I have been adding inhibitor via one of the radiators, but is there a way of doing it via the boiler itself please? I can't see where I would connect a pressurised can to? Thanks.
  6. Hobo128

    Worcester G* Cdi 37kw... Luke warm DHW

    Hi guys... Happy New year to you all.... Been out to a Worcester Greenstar Combi last week.... Problems with hot water not getting very hot.... Boiler is set to max on and I'm getting about 40 degree out of the tap.... Turned of the flow and return at the boiler to check diverter but this made...
  7. L

    Worcester 15ri Issues

    Hi, i was wondering if somebody could give me some advice..... I was called out to a boiler breakdown the other day. Worcester 15Ri. When i arrived onsite the blue light was flashing i put it into reset, fan started, boiler ignited . Boiler reached temp very quickly and shut down on overheat. I...
  8. M

    Difference between Bentone Inter B9A and B Worcester burners?

    Does anyone know the difference between the model B9a burner installed on the Worcester Heatslave 12/14, and the B9b in the 15/19? On the face of it there doesn’t seem to be much difference. Unfortunately the B9a that I have got has had bits robbed off it so it’s difficult to do a direct...
  9. P

    Help needed! leaking isolation valve on Worcester Boiler

    So, got a lot of water leaking from my boiler. (Old Worcester 28CDI) Looking underneath it appears to be from the isolation valve (at the point where you close or open it) I've switched off my water supply, and turned off the heating for now as I'm about to go to bed. Question is, is this...
  10. S

    Worcester Bosch Greenstar 24i Mk4 system boiler that is locked out.

    Hey Folks. I have a Worcester Bosch Greenstar 24i Mk4 system boiler that is locked out. The boiler was working correctly, then the gas supply was turned off (to service another appliance) but the boiler was not turned off. I assume that the boiler tried to cycle on and off as requested by the...
    • StevePatts
    • Thread
    • boiler bosch greenstar system worcester worcester bosch
    • Replies: 3
    • Forum: Boilers
  11. S

    Worcester Bosch Danesmoor 20/25 Problem

    Is there anyone out there who has come across this problem. Our boiler locked out so pressed the reset button and it seemed that all was fine. Red light went out and fan started etc. About an hour later noticed nothing seemed to be warming up. But motor was still running and no lockout. Called...
  12. S

    Worcester Greenstar 30i ErP heating Issue

    Hi I am wondering if anyone can give me some advice/help with this issue. I have a Worcester Greenstar 30i ErP which got it's first yearly service by B/Gas 2 days ago. The boiler was working fine prior to the service, and seemed to work o.k yesterday, this morning the radiators went cold...
  13. S

    Viessmann/Worcester/vaillant

    I have done a extensive research and watched hours of videos about all of them and looking for the most suitable boiler for our house. The house is 5 bed, 4 bathrooms, 20 radiators and maybe in future underfloor heating, 5 people living here and very rarely we use more than one bathroom. Flow...
  14. S

    Worcester Greenstar 8000 Style 50kW versus Viessmann Vitodens 111-W 35kW Storage Combination Boiler

    I would be grateful if I could have some details about both of these boilers. so I was thinking of a point system from 0-10 on the followings and any details you could share I would be most grateful. 1.Built quality 2.durability 3.customer service 4.ease of servicing 5.user interface I live in...
    • shaya88
    • Thread
    • boiler greenstar worcester
    • Replies: 6
    • Forum: Boilers
  15. C

    Worcester Greenstar Boiler

    We have two issues. I suspect that they are not actually problems – the heating work fine. Worcester Greenstar CDi. Installed in unheated garage. Protected by Honeywell pipestat and froststat. 1. The garage was cold (approx. 7° C). The room thermostat had demanded heating and the...
  16. R

    Worcester Boiler change to Combi

    Hi All, I'm looking into changing my conventional boiler (Worcester 30CDi conventional) to a Worcester Greenstar 8000 Style 30kW Combi. My house has 2 bathrooms/4 beds - showers (Aqualisa) in both bathrooms, but never likely to be on at the same time. Has anyone made the switch with these...
  17. M

    Can anyone help with a worcester greenstar 37cdi combi?

    It works fine during the day but when it turns off at night, I.e no demand, in the morning it won't fire up. The roomstat is calling for heat ok and there are no fault codes coming up but the green pilot light isn't lit and the boiler doesn't fit up until I push the reset.
  18. J

    Wiring for ufh zone Worcester greenstar heatslave 18 25

    Hi, first im gas safe registered so know a bit about wiring but my own boiler is giving me a head ache. Worcester greenstar heatslave 18 25 oil i fitted a nest just linked ch from boiler demand to programmer demand all good. I now want to wire in another stat for my ufh but dont know what to use...
  19. S

    Worcester Keyless Fill Extremely Slow

    I've got a Worcester Greenstar 38CDi Classic ErP with a keyless filling link. One of the rads has a tiny leak so every few months I have to top up the system (and bleed a rad upstairs). I should get the leak fixed but since it's so minor I haven't bothered. My actual problem is that the system...
  20. R

    Worcester Greenstar 38cdi Classic Combi Minimum Flow Rate

    Hello there, I'm wondering if anybody can advise me, please. I'm in the process of switching my thermostatic radiator valves to Drayton Wiser valves. I currently have one radiator fitted with lockshield valves as a bypass, but I would like to put a Wiser valve on this as well and incorporate...
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