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  1. B

    Glowworm Fuelsaver MK2 Pump overrun

    I have an old Glowworm Fuelsaver MK2 in a Y plan installation. It's still working ok apart from an issue with the pump overrun... As of 2/3 weeks ago, when the room stat switches off the boiler, there is sometimes a thump in the vent/expansion pipe as hot water / steam is pushed up into the F&E...
  2. S

    Wireless Honeywell T3R with Glowworm Ultimate

    Hi all, I’m not a plumber but looking to change my parents Dial Thermostat & potterton programmer to a Honeywell wireless type . They currently have a Glowworm ultimate boiler and the programmer does the heating & hot water (cylinder) separately once / twice a day or off . I do have a wireless...
  3. D

    Glowworm 18HXi Reporting Error F13 (PCB Fault)

    Hi All, Problem with a GW 18HXi reporting error F13 (PCB Fault). I've replaced all the electrolytic capacitors on the PCB, many bulging with high ESR. After reassembly the fault remains. Swapped board with a known good one and the fault remains. Any ideas?
  4. D

    GlowWorm 30 CXi gas test cap has fallen apart.

    Hi everyone. When I looked in the cupboard where our gas combi boiler is installed, I found a wee white plastic cap which had pretty much disintegrated. A search found it was the cap that's meant to seal off the flue test point - from which a nice breeze from outside was ensuing. As it...
  5. M

    Glowworm Hideaway 100FF Non volatile lockout / reset light on

    Hi, I inherited the above boiler when we moved house about 3 years ago and it has never given me any trouble until now. In the last few weeks we have noticed that the heating is not coming on every now and again and when I look at the boiler the reset light is on. We realised that our 18...
  6. R

    Glowworm 30HXi condensate trap outflow speed

    Hi I inherited an LPG burning Glowworm 30HXi when I moved into my house some years ago. Great little boiler but had been neglected. I cleared a lot of debris out of the heat exchanger and chamber at base, on top of the condensate trap. I always flush several litres of water through the trap...
  7. Bbarclays

    No hot water open vent glowworm fuelsaverMKII R40

    Hi there Today friend was changing radiator valves, so he drained system, put radiator valves, new radiator. I notice TRV valve was on cold end- return or out line from radiator. I asked my friend to relocate TRV valve on inlet side. (when heating started, hot water was coming from white plastic...
  8. king of pipes

    Glowworm hideaway service

    Not many of these left on my books but all in all in pretty good nick for 20 years + . Kop
  9. V

    Anyone got a heat exchanger for a Glowworm Hideaway 50 ?

    Hi, long shot I know, but has anyone got a heat exchanger for an old Glowworm Hideaway 50 Boiler as mine has split and is leaking !!! Thanks
  10. king of pipes

    Glowworm ultimate 24 hxi

    8 year old Glowworm serviced by me every year for the last 7 years still running sweet just shows the importance of good servicing . Kop
  11. T

    Glowworm Micron 40FF problem

    Hi I have a Glowworm Micron 40FF and it fires up ok but then trips out after a little while with the two LEDs alternately flashing. The thermistor value is ok and the OH stat switch is closed The manual says this is a software sequence error so I thought it was a PCB fault However I have now...
  12. quality

    GLOWWORM 800869 GAS VALVE 100F HONEYWELL VR4601

    Anyone got a gas valve for a fuelsaver 100f as per above. System is linked to a log burner so would like to fix the old girl as shes only 30 years old
  13. O

    glowworm flexicom 30cx boiler - over pressure & drip

    Hi, after some help with a flexicom 30 CX - 9 Years old. Pressure slowly creeps up toward 3 bar, followed by a very slow drip. Plumber has been out & done the follwing: Represurised expansion vessel Relpaced plate heat exchanger confirmed both filling loop valves are passing water. Plumber now...
    • ogbsn
    • Thread
    • boiler glowworm pressure
    • Replies: 7
    • Forum: Boilers
  14. KingDoey

    Glowworm Energy Store 35

    Hi all Am fitting one of these next week. Made a start Friday and hung it on wall. In the box you get a TMV blending valve and a Caleffi branded combi bloc for the unvented side of things. The book tells you nothing! I have sussed it I think but just have one question. The combi bloc has a...
  15. KingDoey

    Glowworm Energy 30c rumbling

    Hello I have the above boiler in my new property. Was only built a few months ago so brand new. To get to the point before I call Glowworm out under warranty, I know their aftersales are shocking. The boiler when lighting is occasionally making a really loud rumbling noise. To the point where...
  16. S

    Glowworm Hideaway 80B pilot light will not stay on

    The pilot light will not stay on my Glowworm Hideaway 80B. I have replaced the valve, the thermocouple, ensured all gas pipes are clear of blockages. I have electrics to all plugs. I can't see anything further I can do to solve this issue. Can anyone help?
  17. T

    GlowWorm Flexicom slow leak

    Hi, I have a Glowworm flexicom fitted in my house and like most it has an issue where the pressure sensor gets clogged up and you need to increase the pressure or you get an F9 fault. Basically, every few years it needs removing and cleaning. Recently I have notice that there is a tiny leak...
  18. 4

    Glowworm 18hxi problems

    I wonder if anyone can help. I moved into a 12 year old 3 storey house just over a year ago. The heating and hot water worked fine all last winter. When I have come to switch it on again now the weather is colder, the hot water is fine but the radiators don’t come on. I turned off the hot water...
  19. R

    glowworm 18 home wire programmer?

    Just fitted a gw18 home. all fires up, only way to get heating is to manually move the leaver on 3 point value, programmer is not connected any ideas on wiring it? old boiler was glowworm 18 sxi with pump in airing cupboard. this has been removed as the gw18 had the built in pump. Thanks
  20. G

    problem glowworm essential 24c

    Just looked at glowwworm essential 24c combi. Only 14months old and out of warranty. Hot water will only run luke warm. Temp coming from heat exchanger only reaches about 45c in hot water mode. Super red hot in heating mode no problems there. Checked thermistors which control both heating and...
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