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  1. AlexGas

    New WB Greenstar 8000 Intelligent Filling System

    Greenstar Intelligent Filling System – the new self filling valve. I was so excited about it but now I’m not sure about it… Had to call the technical and they sad to me that the valve will do no more than two consecutive top-ups within the set blocking time - 4 short bursts at the time. The...
  2. B

    GREENSTAR 25i GAS CONDENSING BOILER

    Just had the above boiler fitted, and my gas fitter has just gone away on holiday. I,ve noticed that the pump ( i assume) seems to keep operating every so often even though i,ve turn the CH down to minimum and all the TRV,s off. I,m awaiting an MT10 programmer as the one i had was no good , but...
    • BADGERPLUM
    • Thread
    • boiler gas engineer greenstar
    • Replies: 21
    • Forum: Boilers
  3. C

    Worcester bosch greenstar 28i Junior no HW

    I have a worcester greenstar 28i junior boiler in my flat, its about 7 years old and has never put a foot wrong apart from losing a bit of pressure over the course of the week. I've moved out of the flat and its been empty for about 8 months, boiler unused. Tried the Hot water at the taps today...
  4. S

    Worcester Bosh Greenstar 30si filling loop

    I'm wondering if anyone knows of a mod that can be done to the above boiler to enable the boiler to be pressurised without having to use the key method which is a pain in the a##e Thanks
  5. KingDoey

    Worcester Greenstar 25i head scratcher

    evening all. Called out to this boiler late last night. No HW. Pressure was down so checked expansion vessel etc and topped up. Hot water demand fires boiler which lights and then quickly reaches 97 odd degrees before shutting down. Get an initial blast of hot water through the pipes then just...
  6. P

    Greenstar 30cdi system leaking under heat exchanger

    Customer called me after pressuring boiler to 1.5bar. Water started coming from casing. I attended, ran boiler for about 5 minutes - no issues, re pressurised to 1.5 water started coming from under heat exchanger on shelf. Spoke to Worcester they said to prove leak on HE top up pressure...
  7. T

    Worcester Greenstar 28i Junior Issue

    Hi All, I just have woken up to no heating and no hot water, The bolier is Worcester Greenstart 28i Junior) on the first instance i have checked the pressure on the boiler which was a little bit below 1, i have topped up to a bit below 2, the bolier had solid blue light on it before and after...
  8. P

    A21 fault on Greenstar Comfort RF

    Hi I have a permanent A21 fault on my Greenstar Comfort RF receiver on my boiler. I am unable to access the settings as it does not respond to any input from the buttons on the panel. My thermostat is showing an A28 fault. My thermostat was not working so I disconnected it from the receiver in...
  9. M

    Worcester Greenstar 28i no green ‘burner on indicator light’ flashing diagnostic light

    Last night our combo boiler got turned off at the mains all night. We noticed this morning when we were all getting ready and plugged it back in. There was no hot water or central heating, the pressure gauge had dropped way into the red, and the burner indicator light no longer came on green. We...
  10. Steve weightman

    Worcester greenstar 8000

    Had a read and watched a video of the new greenstar 8000 today first I thought it was a speaker to start with and not a boiler looks smart though but the video had hidden pipes so not so pretty when visible. 50kw as well,blimey, you'll do well to have mains water pressure to benefit from this
  11. J

    WORCESTER Greenstar 15Ri

    How do you repressure a Greenstar 15Ri once you've drined the central heating system? Where should I look?
  12. Ted808

    odd one, worcester greenstar, 40CDi, classic, regular

    Custard went off on holiday, came back boiler didn't fire up. EA code, reset -nothing. Called me, got there, checked for gas, checked condensate pump ok, took cover off to check ignition and the flame rectification lead was disconnected? How would this happen? Any clues? igotnoidea...
  13. A

    Worcester Bosch Greenstar 28i LOSING PRESSURE

    Hello. This is my first ever post. My boiler is just over 5 years old and started losing pressure a few days ago (daily drop of approx 0.5 bar). A Gas Safe Engineer carried out a full service. EV needed to be re pressurised and he said that all was well. A few hours later pressure dropped...
  14. R

    1 inch of water lying in the top compartment of a Worcester Greenstar 28i junior

    Has anyone ever came across about an inch of water lying in the top compartment of a Worcester greenstar 28i junior. Was wondering if anyone knows the possible cause? Thanks.
  15. M

    Worcester Greenstar Expansion vessel

    Hi, Serviced a boiler today that was over pressurising when heating up, so thought it would be a simple case of drain down and re-pressurise the vessel. tried that and found that the vessel would not take any pressure as if the valve was blocked, I removed the schrader valve but no change...
  16. D

    Worcester Greenstar 12/18 Locking out after heating circulates

    Hi Guys, I have a Greenstar 12/18. External Oil Combi. 3 weeks ago it cut out . Changed photocell as they have died on it before. Still didn't work. Single red light on burner. So I checked the fuel. Discovered water had been sucked into the pump and the oil pump was goosed ! Sludge and...
  17. C

    Greenstar 24i junior

    Hi all can someone help me out. How exactly do I check the resistance on the solenoids of the gas valve I can't get my multimeter anywhere near the connections Thanks in advance
  18. H

    worcester greenstar i boiler

    Hi I have a new Worcester Greenstar i combi condensing boiler and im a little confused!!! I have central heating temp set to 60 degrees C and water temp set to 50 degrees C. Also using Danfloss thermostat (set to 21 degrees ) I have load compensation set to 3 cycles per hour. What is...
    • hotdogharry
    • Thread
    • boiler greenstar worcester
    • Replies: 8
    • Forum: Boilers
  19. G

    Worcester greenstar 42cdi heating issue

    H everyone havnt posted for a while hope everyone is good. Got a call to above boiler today customer saying fault with heating and e9 fault code showing. Hot water is fine. I couldnt get fault code to appear but looking in manual e9 states overheat issue. All thats happening is pump pulsates for...
  20. P

    Worcester Bosch Greenstar 30 CDi Conventional Boiler

    Hi All, I have the above mentioned boiler linked to a Nest Thermostat. The problem I have is when the boiler is set to No.5 which heats the water to circa 67 degrees, it reaches temperature, the gas light goes out and it cools down to circa 30 degrees then heats back up again. This continues...
    • Philip Bartleet
    • Thread
    • boiler bosch greenstar worcester worcester bosch
    • Replies: 7
    • Forum: Boilers
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