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  1. J

    Glow worm 30ci F9 fault

    Burnt my head out this one! Internal filling loop, Soding out when try to fill. Fitted new one, couldn't get pressure above 0 bar f9 starts flashing. Checked on low water pressure sensor with multi, was saying that I've got 2.5 bar of pressure in system when check white and orange wires I...
  2. J

    Glow worm ultracom 30cxi Combi boiler Fault.

    Hi guys. Wondered if anyone could shed some light on this. I have an ongoing problem with my ultracom 30cxi that was fitted about 7 years ago. (Wish I’d bought a worcester). I lose water pressure when the hot taps run. The boiler dumps the lot through the pressure relief valve. The...
    • Jimmythechin
    • Thread
    • boiler combi combi boiler fault glow worm
    • Replies: 15
    • Forum: Boilers
  3. N

    Glow worm Ultimate 120ff replacement recommendations, please

    Hi, My Glow worm Ultimate 120ff is dying - just started leaking from the heat exchanger, which I assume is terminal. I'm looking for a replacement regular boiler for my traditional, open-vented S plan installation, as 'like for like' as possible under current regs, with reliability and long...
  4. Chriswareham

    glow worm hideaway 70 cf

    hi i am having a problem with a glow worm 70 cf the pilot goes out after 20 mins running i have serviced and cleaned the boiler carried out smoke pellet test all ok i have changed the pilot assembly complete kit with new injector new thermocouple boiler is running at 11.3 hot burner pressure in...
  5. B

    glow worm energy

    how do I access installer level very little in installer manual unless I am being dense want to put it on min burn
  6. B

    Glow worm 60FF Micro - boiling noises with hot water only

    Hello gents, We have a Glow worm 60FF Micro - which makes boiling noises only when the hot water is on. My expertise is limited so please take it easy with technical info. The 60FF did make this noise about a month ago but it stopped after a few days. Any test I can do to find out...
    • Benesen
    • Thread
    • glow hot water water worm
    • Replies: 4
    • Forum: Boilers
  7. H

    Glow Worm betacom 24c hot water flow rate.

    I have glow worm 24c combi boiler. The hot water flow rate is next to nothing, at all outlets. Mains water pressure is good. One other problem was the rads getting hot when hot water only. Thinking this must be caused by the diverter valve not working correctly and that the dhw heat...
    • hestia
    • Thread
    • flow glow hot water water worm
    • Replies: 3
    • Forum: Bathroom Advice
  8. V

    glow worm hxi 30 boiler f9 fault code, what it means blown fuse on pcb main board

    glow worm hxi30 boiler f9 fault code. no low water pressure switch on this boiler.and blown fuse second on pcb (does tis mean board gone?) main board pump external to boiler. grundfos 25-80 slight history of job, arrived to fit dual fuel cooker gas hob electric oven. fitted connect l.N.E to...
    • vic66
    • Thread
    • boiler fault glow main worm
    • Replies: 1
    • Forum: Boilers
  9. eagleeye

    Glow worm ultracom

    One of my guys installed a Glow worm ultracom 2 in a flat just over 2 years ago. Everything has been fine until last Friday when I get a call saying water was pouring out the bottom of boiler. Had one of my other guys go look at it and he said water had stopped but when he topped it up water...
  10. R

    Glow worm 30ci

    Hi all have one of these in a customers house that a bit of a head scratcher heating runs fine but no hot water. Turned of the power removed the motor on the diverter turned the power back on and the motor powers forward. With the head removed and power on we get hot water. So I changed...
  11. J

    Old glow worm boiler

    Hi i have an old floor standing cast iron gas boiler (glo worm) which provides our central heating. I think it has imperial nuts and bolts and it feeds a micro bore heating system. The boiler looks like it has finally given up the ghost! One of the heat exchangers has failed and started leaking...
    • jealvistuma1
    • Thread
    • boiler glow worm
    • Replies: 4
    • Forum: Boilers
  12. T

    glow worm betacom 30 diverter valve

    Got one of these with ch water tracing up the flow when the hw is in use, Iam I right in thinking changing the diaphragm on the diverter valve will solve this? or will the whole valve need to be replaced? thanks in advance guys & bah-humbug
  13. C

    Glow worm sxi not hot enough

    Went to this job last week and it just sat at 35 degrees on the boiler, which is basically tick over mode i pulled the stats off the flow and return pipe work on the boiler and then after a few minutes it whirred into life, so I thought ok, the thermistors must be on their way out so I changed...
  14. C

    Glow worm Betacom 24

    Been to this boiler as it had a leak on the prv. been back again as its still dropping pressure,prv is tight, no leaks in the house,i have checked everywhere and its baffled me as to where it can be, i checked the main exchanger, nice and dry. i disconnected the filling loop to make sure it...
  15. M

    Glow worm ultracom 30cx - setting combustion??

    Glow worm Ultracom 30cx combi. Was unable to set boiler into min or max rate in order to check/set co2 readings. MIs say press reset button then quickly press and hold the "+" button until "Hi" is displayed, but there is no "+" button on the user control?? Took off the back of the control panel...
  16. S

    Glow Worm 30cxi - Main PCB blowing, any advice?

    Good Morning Everyone, I have a Glow Worm 30cxi Condensing Combi Boiler. Last week, the main pcb died. I got the board replaced (4000124180). Boiler came back on, happy days. I did notice that the water was nowhere near as hot as it should be and been advised the Plate to Plate Heat Exchanger...
  17. P

    New Glow worm 12 energy ERP boiler on existing Y plan system.

    Evening all. Fitted the the boiler on Friday, Commissioned it using test mode, handed over to sparks for wiring up the controller, Mid position valve, Room stat and cylinder stat. They couldnt figure it out, GW (Vaillant) Tech support don't work at weekends despite the fact that they claim...
  18. R

    Glow worm 38cxi hot water pain

    Hi all went to one of these the other day and it's got me scratching my head. The hot water temp was fluctuating greatly, running hot cold with the boiler cutting in and out. Took the plate heat ex out gave it a bath in some nasty acid I've got, usually does the trick puts the it back and...
    • Richie_77
    • Thread
    • glow hot water water worm
    • Replies: 3
    • Forum: Bathroom Advice
  19. V

    glow worm easicom 24 boiler timer

    hello. i got problem with timer. i broken plastic part for switching on or off. i need to change time. maybe somebody know can i use 0020095196 (number of timer) its good for my easicom boiler? thank you
    • vytukas009
    • Thread
    • boiler glow worm
    • Replies: 7
    • Forum: Boilers
  20. shaky

    Glow worm flexicom 30cx

    Hi all, Just got a call to look at one of these boilers, heating ok no hot water any common problems with these boilers?
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