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  1. L

    Needing some help - no plumbing knowledge

    Hi - I'm new here. I have a Glow-worm flexicom hx boiler that had a f25 error code and isn't heating my water. I have bled all the radiators, then reset the boiler and now have a f22 code. Can anyone offer advice please. Thanks.
  2. Steve weightman

    Glow worm protherm 40/50 ci behaving weird

    Hi folks a letting agency boiler I've been asked to diagnose and repair the first visit the fans on but no sparking first thought was aps and the orange light on the pcb was also telling me so it's the pcb with the two fuse. So new aps fitted now I have the orange light to say aps proved and...
  3. L

    Glow worm 24ci not working

    Hi there, we have a glow worn 24ci boiler which won't kick in, keeps flashing 0.4 with a red light above. Have tried to Google it to see how to re-pressurise but nothing has helped. Does anyone have any suggestions please?
  4. Inverness

    Glow worm betcom 4. Making noises

    hi guys, replaced a combi swap a few months ago and customer has contacted me, saying sometimes when they open kitchen cold tap the boiler makes a noise but doesn't fire up? I connected hot and cold correct way if your asking lol. The mains pressure is very high could this be causing problems...
  5. P

    Glow-worm 24kw Betacom 4

    Good evening What would be the gas rate on max Ch and Max Hw Been set question but can't find the info Thanks
  6. B

    Glow worm ultimate pcb

    went out to a customer and found the pub burnt out. It’s an old ultimate 30ff. Found the replacement part number via glow worm archive and contacted Wolseley to get a price. There does however seem to be a discrepancy. Glow worms part number is for a two fuse pcb, wolsely don’t list the...
  7. S

    Glow Worm Ultimate boiler no ignition and no pilot...

    Hi, I came in tonight and turned the central heating up. Nothing happened. It was working fine this morning. There is no pilot light and the igniter is not firing. Power is getting to the controls, as I can here a click as I turn the power on, after turning it off from the switch. I am going to...
  8. R

    Valliant Glow Worm Heater Exchange - Pro Therm 80e

    Hi Everyone, Does anyone know if the heater exchange (0020025264) from a Valliant Glow Worm will fit into a Pro Therm 80e? Thanks Rob
  9. C

    Glow worm Boiler advice

    Hello all, new member, first post.... After some advice on a Glow Worm Flexicom 30hx boiler before I throw more money at it. It is having troubles lighting up when the temperature is below about 5°c. It tries to start as normal, fan runs and you hear a woompf as the gas ignites but it then...
  10. Inverness

    Space saving frame for a betcom 4 glow worm

    Do you know if you can get a space spacing frame to project the boiler further out than hard to the wall.
  11. Frank Nicklin

    Swapping a Glow-worm 18hxi for a combo boiler

    I'm re-modelling my bathroom to remove the hot water cylinder. I currently have a single pipe 'S' Plan system running on gravity feed hot water and pumped CH. I installed the CH system back in 1986 when money was tight. The original Glow-Worm boiler was replaced about 8 years ago with a...
  12. Steve weightman

    glow worm fuelsaver manual needed

    really would be appreciated if any one has the glow worm fuelsaver 40br installation manual to hand having to do many visits to get it sorted out.
  13. N

    Glow worm 15hxi - dripping water

    Hi, over the last couple of days I’ve noticed that there's water dripping from the corner of the boiler. This only happens when the boiler is in use. Up to now the boiler is functioning and heating water and central heating. I would just like to be advised whether this is going to be a major...
  14. S

    Glow Worm 38CXI Hot Water Issue

    Hi There I hope you can help or point me in the right direction. I have a Glow Worm 38CXI boiler. The Central Heating is working perfectly however a few weeks ago we started to experience a problem with the hot water. When running the shower or putting a big demand on the hot water tap the...
  15. H

    Advice needed about an old boiler Glow Worm Space Saver 38.

    Please could anyone advice. I have a 36 y.o. Glow Worm Space Saver 38. I have had it for the last 6 years when bought my current house. I serviced it for the first two years but then stopped servicing in fear that it could be condemned just for being old an inefficient or no spare parts. I did...
  16. Inverness

    How to Commission a glow worm betacom 4 30c combi

    Hi guys, I've just wasted so much time trying to figure out how do I achieve low and high firing from this boiler.. I've read the manual many times but still don't make sense. I did a replacement boiler change which should of taken half the day not 12 hours! Due to not managing to commission the...
  17. B

    Glow Worm boiler keeps cycling with no demand

    Hi all, first post but have a major issue that's causing me headaches. My system boiler (Glow Worm Flexicom 18hx) continues to cycle to keep itself up to temperature, even without any demand from the programmer (Drayton Lifestyle LP 522) which is also causing the pump in the upstairs airing...
  18. F

    glow worm flexicom 12hx

    at the moment i have 5 radiators 1 double and 4 single panel. they all are 40 odd years old , i want to relace all with double panel ones. would my boiler cope ok ?. it is a condenser boiler and the tank in the loft is open vented. hope some one can give me any advice. thanks.
  19. S

    Glow worm hot water problem - please help!

    Hi I’d really appreciate some guidance as I’m now utterly confused. My boiler (compact 100e) seems to be working ok except can be very slow to produce hot water from the taps (starts off cool slowly warming to reasonably hot, particularly if CH has been off), and also at times just luke warm...
  20. H

    Glow-worm Ultracom 24hxi Heat Cycle Issue?

    Hello Forum, I've noticed at times that my boiler is heating in a very short cycle. 30 seconds on at full flame, heating to 65c. 30 seconds off, cooling to 37C. 30 seconds on at full flame, heating to 65c. It cycles like this for 10mins or so, then goes quiet for a period of time, then...
  21. Inverness

    Cheap glow worm betcom 4 30c

    Advice, I'm wondering about the glow worm combi that has the mechanical time clock displayed on the front panel, can this be disconnected? As I'll be installing it in the loft and using the exciting room stat/ programmer. Not much experience in glow worms and I don't do electrics.
  22. L

    Glow-worm boiler settings help

    Hi, need some help please. we have moved into a new house which has glow-worm easicom 28 installed. The heating is set to 70 and hot water is set to 60 on the boiler and the hive is set to 22c The problem we are having is 1) that it takes almost an hour for the radiators to start heating or...
  23. A

    glow worm ultracom2 store 35 tripping on dhw.

    Looking for some guidance please. I have above boiler, its the 35 store, been in 6 years and now it trips out (at boiler reset on boiler) when calling for hot water, after about 4 or 5 miinutes run time. central heating no poblems, had heat exchanger replaced about 2 years ago and high temp...
  24. M

    Glow Worm Ultimate3 Stat Wiring

    Hi, can anyone clarify wiring and Honeywell 927 and BDR91 to a glow work ultimate 3. The BDR91 is currently set up as a 240v feed with 4 core cable. LNE are going straight from the receiver to the boilers LNE. I then have L bridged to A in the receiver. Does B from the receiver just go to RT...
  25. A

    Glow worm store 35 f81 code.

    Hi all Got a problem with above boiler, fault code f81 and discharge from vent, central heating working OK. I think it may be a faulty temp sensor causing overheating, gauge shows 55degrees. Any thoughts very much appreciated Cheers .
  26. M

    Glow worm easicom 28 leak

    Morning all, I have a slight leak issue with my combi boiler. I have noticed that there seems to be some water leaking from the bottom of my boiler, when I removed the cover just to see if I could spot the source I noticed there wasn’t really anything obvious until I accessed behind the...
  27. P

    Glow Worm 30cxi will not switch heating on/off with timer

    Hello folks. I have a 12-year-old Glow Worm 30cxi combi powering hot water and central heating. The analogue timer clock packed up recently and would not fire up the central heating either. Assuming it to be a fault with the clock, I got a second hand replacement and fitted it. Clock keeps...
  28. K

    Banging noise from Glow-worm boiler

    Hi guys, I've got a Glow-worm Ultimate 30c making really loud banging, clanging noises when operating DHW and just after closing it. Apparently it happens also on heating but not as often and while there, I didn't test it long enough on heating to find out. The flow temperature on the display...
  29. S

    Which boiler - Alpha, Glow-worm, Worcester, Vaillant

    Need a new combination boiler, so far have had two quotes one for an Alpha E-tec Plus 33 and one for a Glow-worm . The glow-worm one said they use the same parts as Vaillant so are as reliable. Are Alpha and Vaillant good alternatives to Worcester and Vaillant?
  30. Inverness

    Old glow worm 30 ci combi

    im reading the manual for this boiler but I don't understand what I need to adhieve for the flue gas anaylser? I know it requires 3.4m3/h on a gas rate test with dhw on full? I'm getting 2.7m3/h. Also how to i adhieve for low firing on this boiler?
  31. M

    obsolete Glow worm return pipe

    Hello I am looking for a boiler part that is obsolete : Return pipe part no S801048 for a Glow worm energy saving combi GC 2 80 47 047 13, model no 801091. British Gas have said they can’t fix my 80 year old mum’s boiler without it. I’ve discovered the boiler has been dripping for months...
  32. MrYates

    Glow worm Ultracom 30sxi expansion vessel replacement.

    After reading about problems and relating them to my situation it seemed that the expansion vessel could be faulty. I depressed the schrader valve inner. After a brief and insignificant exhalation, I gave it a pump. There was a gurgling bubbling noise from the EV. On re-testing for pressure...
  33. S

    Glow worm 24ci overflow pipe

    Hi, My glow worm boiler seems to be working as normal but I am getting a constant pouring of water outside from the overflow pipe, any ideas what I should check?
  34. T

    Glow Worm 30cx, can't get C/H to work and Rad symbol showing OFF

    Evening all First off a big hello from a sparky to all you fellow Plumbers/Gas Engineers out there. I'm not here to say who's better than who and I really do hope you will all show me mercy as I will admit even I have limitations, hence why I am here to ask for help. Basically, I have...
  35. daWilko

    Advice on Glow Worm boiler please

    Hi All, I'm new here but fairly active in Sparks Forum (@Last Plumber where are you?). I've recently moved and have a Glow Worm Flexicom 18hx. Heating is gravity fed, y plan, external pump, small loft tank for CH and large tank to feed taps and HW. It all works, but not very warm. The boiler...
  36. G

    Glow-worm central heating system not heating up properly

    Hi I'm looking for some help or advice about why my central heating is not heating up fully. The radiators are heating up a bit, but most are not hot. The upstairs ones near the boiler are hottest. The boiler is a Glow-worm Ultracom2 30SXi. Looking at the control panel, the temperature is...
  37. D

    3 bed bungalow, Glow worm 125 electronic combi , heating excellent, taps temp rubbish,

    Hi folks, I recently moved into this bungalow and am not at all happy with the boiler, which is situated in the garage. Every morning I have to run off 3/4 of a bucket of water before any hot water arrives and even then it's not very warm I have to boil a kettle to wash the dishes. Kitchen and...
  38. K


    I have just moved home and inherited the above boiler which it doesnt seem has been maintained or serviced. So far we have established that the boiler thermostat is not reacting to the boiler temperature. The boiler is heating up very quickly then gets to a high temp or about 72, the rads...
  39. 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...
  40. 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...
  41. 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...
  42. 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...
  43. 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...
  44. 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...
  45. E

    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...
  46. T

    Glow-worm 12HXI ignition faliure

    Every winter without fail this boiler throws an F1 code a couple time a week. What I find strange is that a quick reset does not help, it tries to fire up but fails again, however, if you leave it switched off for 10 minutes and then turn it back on, it fires up. Anyone know what the issue could be?
  47. 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...
  48. M

    Glow-worm ultracom 30cxi

    I have a problem with an ultracom 30 cxi, boiler fires temp rises quickly, boiler goes off and cools quickly, fires up again and keeps repeating. This is happening on heating & hot water.
  49. R

    Hive and Glow-worm 18s System Boiler

    Hi, I have to fit a hive to a glow worm 18s system boiler, any help with the wiring between the two would be greatly appreciated
  50. 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...