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junior

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  1. J

    Worcester 28i junior zero bar but heating fine

    Hi all, Not sure what action to take here. I've noticed that the pressure on my combi is consistently falling to zero and I have to refill the system every few weeks. I have tried bleeding the radiators and I can’t see any signs of a leak anywhere in my home or at the external pipe...
  2. M

    Worcester 28i Junior condensation in combustion chamber

    Hi Guys, long time since I have been on here. Life's extremely busy at mo with work and family etc. Wondering if anyone can help. Got called to the above boiler which had stopped working. When I opened it up I could see moisture over the innards and a pool of water on the bottom of the...
  3. the_d_o_t

    Worcester greenstar 28i junior dripping flow turbine

    Hello people i have a Worcester greenstar 28i jnr where there was a leak coming from the front section (if you was looking stood in front of the boiler) of the flow turbine I've herd its quite common on this model because they came up with the fantastic solution of covering the diverter with...
  4. S

    Worcester 24i greenstar junior locks out

    Hi all I'm wondering if anyone can help with any suggestions on a very frustrating problem We moved into a house about 2 years ago and it had the greenstar 24i junior feeding a mega flow. Randomly, the boiler would lock out - the blue, reset and eco light flash in sequence. As soon as you...
  5. J

    Any advice please? Heating won't come on, Worcester 28i junior

    Hi, new on here. Been having problems for few weeks, sometimes heating will come on, sometimes won't. Had central heating engineer to come and fix it and service few days ago, it was full of dirt. It was working when he left, cannot get heating on this morning, It has been working on and off...
  6. D

    greenstar junior 28i heating problem

    Got called to this boiler earlier for an issue with the heating. 2 of the 5 rads were luke warm at the top and the other 3 pretty cool. checked at the boiler which was set to max on the temp dial. Boiler sounded like it was full of air while the pump running. Tried to bleed the pump and when...
  7. R

    Worcester 28i Junior prv blowing after replacement

    Hi the boiler had been losing pressure for some time so we kept topping it up. We diagnosed that the prv had gone because it had been blowing and the expansion vessel had gone because it was letting water out instead of air. We replaced the prv and attached an external expansion vessel. We...
  8. B

    worcerster 24i junior

    Hi guys ive got an issue with the above boiler on start up it puffs 2 or times before it runs almost like co's are wrong but they are spot on, had burner out electrodes etc all look fine but I cleaned them anyway,the flaps in the back of the fan are all fine gas pressure is 20mb standing and 19...
  9. sammathias

    Worcester 28i junior lock out problem.

    Alright guys, another problem which i havent actually been to investigate but the blokes a plumber i know so ran through it over the phone.... Basically if he turns heating on, heats up fine no worrys. however if he then turns ho****er tap full bore at same time boiler will lock out after 20...
  10. C

    leaking 28 junior

    my mate just bought a house with a junior 28 combi, it had been standing for a while as the previous owner was in a home, the boiler is only 4 yrs old and is a really bad install , heating water is totally black , around the flue not sealed ect ect , I opened it up as he told me it would not...
  11. A

    worcester greenstar 24i junior keeps turning off

    Hi, Hoping someone can help me, I have a Worcester Greenstar 24i junior that keeps turning off after about 30mins to an hour. From what i can tell it seem's to be on a timer if the big dial in the pics is a timer? When i rotate it and get to 4 O'clock it turns on. I have tried resetting it but...
  12. Darren Jackson

    Greenstar 28i junior DWH problem

    Hi, I have a Worcester greenstar 28i Junior combi mk111, that works fine in CH mode but locks out in DWH after 1-2 mins, Slow Flashing blue (light mostly on) with flashing reset showing, I have re pressurised the expansion vessel as it was flat and Pressure is reading about 1.2bar now and...
  13. J

    Worcester bosch junior 24 i

    I am needing some help on a 24i regarding internal leaks.About three months ago I re pressurised a 24 i and checked all the rads left the system running.three months later it's dropped below running pressure so tracing 1 bar over three months is lots of investigating.I will put in a leak sealer...
  14. G

    Grecnstar 28i Junior fault

    Hi Woke up to no hot water or heating (not that I need it) No pressure in system so filled it then reset the system. Blue light still flashing and when i turn on the hot tap it doesnt even try to spark up- same for heating Cant see green light for flame also Any thoughts would be appreciated
  15. T

    Worcester Bosch greenstar 24i junior control panel is missing transmitter

    Hi there, I've recently moved into a house with a Worcester Bosch greenstar 24i mk iv boiler. It has a DT20RF control panel but the wireless transmitter was not here when we moved in. The hot water works but the central Heating side of the control panel won't let is toggle between 'on'...
  16. S

    greenstar junior DHW problem

    CH is fine but no hot water. I am leaning toward the flow sensor. Anyone know the voltage between the 3 wires black, yellow and red from the sensor ? Much appreciated and thanks in advance.
  17. A

    Worcester 28i junior - Excessive CO

    Hello guys, My name is Dave, I'm a gas engineer from Exeter, Devon & I've been having some trouble with a Worcester 28i junior combi boiler today. The boiler is 4yrs old & outside the Manufacturers warranty. I'm not very experienced with the newer Worcester boilers. The customer called...
  18. C

    Greenstar junior flow sensor tips

    Anyone got any tips on how they manage to get the flow sensor and water inlet pipe back in far enough to get the clip down after you've changed the o-ring at the back, I've done it a few times but always a struggle, by far the worst job I've had to do on these boilers
  19. G

    worcester 28i junior

    tomorrows first job in morning. customer phoned to say hot water fine but heating is coming or for about 30 secs then cutting out and not coming back on till reset. just wondered if anyone has advice on these boilers. any advice very appreciated.
  20. M

    greenstar 24i junior boiler pressure keeps falling

    The system pressure gauge keeps falling to zero almost daily. I have checked all radiators, and the out pipe isn't leaking. I refill to 2 bars but by the next day it's down again. The boiler is 10 years old but we have never had a problem with it and the heating is fine. Please advise. M.Ray
    • m ray
    • Thread
    • boiler greenstar junior pressure
    • Replies: 3
    • Forum: Boilers
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