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Discuss Hot water cutting out on combi boiler in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Stehuggey

    Stehuggey New Member

    Hello all I've got a combi boiler and when I run the hot tap the boiler fires up for about 20 seconds then cuts out for about the same time and basically just running hot and cold not funny if you are in the shower ha ha . Any ideas what could be problem. Oh the heating is working ok. Thanks
     
  2. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Is it all hot taps or just the shower ?
    What is the boiler ?
     
    • Agree Agree x 1
  3. AMGasServices

    AMGasServices GSR

    Id say it’s an issue with the shower.
     
  4. Stehuggey

    Stehuggey New Member

    It's all hot water and it's a ace high halstead
     
  5. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Job for a gas safe man then , sorry .
     
  6. AMGasServices

    AMGasServices GSR

    The hot water is probably going down the central heating side. Does it fire up in hot water ?

    If so check the central heating pipes see if they are heating up ?
     
  7. Stehuggey

    Stehuggey New Member

    Ok cheers
     
  8. Stehuggey

    Stehuggey New Member

    Yes it does fire up in hot water but cuts out after about 20 seconds so water starts running cold then kicks back in again
     
  9. Sparkgap

    Sparkgap Active Member

    If your flow rate is okay it could be the flow switch on the boiler. Get a gas safe bod to have a look.
     
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