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Glow Worm Flexicom 24hx Boiler F5 & F22 Faults

Discussion in 'Plumbing and Central Heating' started by Gary Hall, 4 Feb 2018.

  1. Gary Hall

    Gary Hall

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    Hi All,

    I have a Flexicom 24hx Boiler about 6 years old, Been fine till about 2 months ago,
    then one morning it didn't come on, F22 Code. I re-set it and all was fine.

    Then 2 days later the same, and then F5 then off again, this went on for about four or 5 days.

    I called a Boiler company and a young man came couldn't find anything wrong and
    said it need a powerflush. Strangely he didn't try and sell us anything else, I was out while
    he was here, so a couple of days later I had the system Power Flushed, they said it would cure all the problems,.. it was fine when they left, then the next day F22, F22, F22.

    So looking at various forms they recommended, Checking all the rads, bleeding etc.
    which worked for about 5 weeks. But now I'm back again F5 or F22.

    Someone said it could be the pump or position of the pump. It about 30ft from the boiler
    in the loft, if quite a large central heating system 12 Rads, as the house was extended over time and the rads have been added.

    So anyone have any ideas ? I'm loathed to get another engineer in as I've already spent
    over £600.00 and I no further forward than when I started.
     
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  3. Jadoo

    Jadoo

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  4. lightning

    lightning

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    Did he take pump off to look inside it, f22 is mostly faulty or slow or blocked pump
     
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  5. Jadoo

    Jadoo

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    Thanks for your reply. The pump has not been touched except to bleed air. Strange, however will get it seen to just in case.
     
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  7. ScottishGasMan

    ScottishGasMan

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    Given the F5 code it sounds alot like it will be the pump (F5 is a proper over heat as if circulation had pretty much stopped all together)

    Also the boiler must have an auto bypass fitted on the system as well, worth checking if thats there(wont likley be the cause of the issue but worth checking and correcting while your at it)
     
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  8. Jadoo

    Jadoo

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    Thank you ScottishGasMan and lightning. It was a stuck pump.

    After getting a few instructions from a plumber I took off the bleed screw and turned the rotor with a flat screwdriver a few times both ways. Then I put the screw back on. Turned on the heating ... again F22 error. Just opened up the bleed screw again slightly and the trapped air got released. Turned on heating again and all seems to be fine so far.
     
  9. AGAS

    AGAS

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    Ye so far it will probably be back ;)
     
  10. ianmcd

    ianmcd

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    download the installation instructions for the pump you have, you wouldnt believe how many are installed wrong and trap air constantly
     
  11. DIYnot Local

    DIYnot Local

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