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greenstar

  1. D

    Heatslave greenstar II 18/25 duel oil feed

    Hi all, Thanks for reading. I just picked up a 2015 greenstar 2 heatslave 18/25 oil boiler to replace my relic from the 80's (still a greenstar bit not up to the flow requirements and it's not a condensing boiler so not efficient). Obviously a used item, it has 2 oil feeds. My current boiler...
  2. P

    Connecting nest thermostat to worcester Greenstar Compact RI

    Hi, is the below pictures the right setup for my nest heat link to my Worcester greenstar boiler compact?
  3. G

    WB Greenstar 8000 Range Rating and Flow Temp

    Hi all, I've had a WB 8000 35kw boiler installed today and was searching through some websites which talked about range rating your boiler and/or turning down the flow temperature to save on cost. I spoke to the engineer that installed it and he advised against rage rating saying that having 17...
  4. Andrew Garrett

    Worcester Bosch i30 Greenstar PRV and Expansion Chamber replacement

    Hi all What kind of time is required to replace the Pressure Relief Valve and the expansion chamber in a 6 year old Worcester Bosch i30 Greenstar? Is this a 3 hour job? Also what kind of price would be reasonable? I am using a new gas engineer and I want to verify that his bill is fair. I am...
  5. D

    How to fill loop on greenstar heatslave ll external

    Hi, I’m trying to locate the filling loop on my combi boiler. There isn’t much info in the manual, just your installer will inform you where to find the filling loop which they didn’t. Any advice would be appreciated, I’ve attached some photos.
  6. M

    Honeywell Evohome with Worcester Bosch Greenstar System Boiler

    I need a little help if possible as I am trying to check that my current system is running efficiently but not really sure how to check, sorry if this is a long one and I have tried to contact a Honeywell connected specialist but they dont seem interested unless installing a new system and the...
    • Mark8par
    • Thread
    • boiler bosch greenstar honeywell system worcester worcester bosch
    • Replies: 14
    • Forum: Boiler Advice Forum
  7. Ted808

    Worcester greenstar, Hot water intermittent.

    Heating works and hot water- sometimes, but I noticed when I turn the hot tap on the pressure gauge drops to zero. I've not seen this before. Topping up the pressure doesn't seem to make a difference. As soon as the heating only is on pressure goes back up to 1.5bar. The thing is the flat is...
  8. M

    Non uniform pressure loss in Greenstar 30i

    Dear All, I hope you might be able to point me in the right direction with an issue I have with a 3 year old Greenstar 30i boiler, last serviced in Oct ‘22, with new pipe work all around the house at time of boiler install. We have separate circuits upstairs and down and a water cylinder. At...
  9. M

    WB Greenstar Intermittent lockout issue

    We have an outdoor Worcester Bosch Greenstar 25/32 Oil Fired Combi. We are getting a random lockout fault, code 855 9F. Pushing reset sorts it for a while sometimes an hour sometimes 4 hours. I can't get hold of the engineer that installed it. Is there anything I could try until he responds...
  10. D

    Worcester Greenstar 30 Cdi Combi loss of CH & HW -overheating

    Hi all, 12 year old boiler, regularly serviced working fine, then wife turned on hot water and it stopped working. Same then with CH. Left it for a while worked and then stopped again. I looked at it when got home and when run water boilersstarts up, temp rises and then it cuts out. Same with...
  11. M

    Low gas rate on Worcester Greenstar Junior 28i

    Hoping someone can give me advice with this one. At an annual gas service today I found a Worcester Greenstar Junior 28i to be using only running at around 12kW on high when carrying out the gas rate. The CO readings were where they should be, fan speed was okay and inlet working pressure was...
  12. D

    Worcester Greenstar 24i E9 with code 276 fault

    Hi, I am handy DIYer but not interested in touching anything boiler related! Just interested before I get a Gas safe engineer out what I could be looking at for what the problem is and rough cost. So in a nutshell, I put a radiator on in a room in the extension, noticed after that the pressure...
  13. N

    Worcester GreenStar 2000

    Hi everyone! Would greatly appreciate advice. I am visiting my elderly parents to find that their boiler is on the blink. As per the attached photo, the small box to the right of the boiler unit has a flashing green light (located at the top). The boiler switches on but then randomly switches...
  14. jcsawyer

    H37XL and Greenstar 12i - Can't get the heating zones to work!

    Hey folks! I have been trying to get my heating up and running properly but I have had some trouble. I bought a new house this year and I have only just got to the point where I'd like to use the heating a bit. The house has two honeywell thermostats (Picture attached) one upstairs one...
  15. T

    Water not heating. Worcester Greenstar 30CDi

    Hi, I have a worcester greenstar 30 CDi Classic regular. The central heating is working fine but the water is not heating. If i put the system off for about 10 mins and start it up again it still does not heat the water. I am not getting an error code. Where do I start? thanks teslacar (BTW...
  16. P

    Intermittent Hot water issue with Worcester Bosch Greenstar 35 CDI

    I have a 16 year-old Worcester Bosch Greenstar 35 CDi combi boiler, which is recently suffering from intermittent issues with the hot water. I usually get the shout from a family member who’s in the shower and found there’s no hot water. If I’m near the boiler when this happens, I can see the...
  17. A

    Worcester Bosch Greenstar 30 CDi - Pressure loss

    Hi all, Recently moved into a new house and noticed the Greenstar boiler has low pressure on the dial. Quick Google suggests using a key, valves, or fill loop to increase the pressure. Only problem being is I don't have either of those things. Any help would be appreciated. Cheers.
  18. S

    No hot water. Combi Greenstar i

    Good afternoon. Our Greenstar i combi boiler works fine for heating but I am trying to find out why the boiler doesn't fire when I call for hot water. The fan seems to go but no blue light or firing up. Checked the pressure, all OK. The radiator underneath the boiler had a lot of air yesterday...
    • Snowyfox
    • Thread
    • combi greenstar hot water water
    • Replies: 1
    • Forum: UK Plumbers Forums
  19. T

    Thermostat not firing up boiler, Salus/Greenstar

    Hi! I'm wondering if anyone can help me get my radiators on :) My Salus ST620WBC ran out of battery after ticking over nicely for years. Got it back on OK .... but now the 'reciever' on the boiler (a Worchester Combi 30si) is not working. It was left with no signal for a day yesterday. I got...
  20. J

    Worcester GreenStar 15Ri - fails with blue flashing light

    Condensing boiler installed by local Gas Safe plumber in 2014, not combi. Failed a couple of weeks ago with flashing blue light which googling suggests means no gas, blocked flue or blocked condensate pipe. There is gas, the flue is clear, and the condensate pipe goes into the under-sink waste...

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