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Discuss Hot water problem Greenstar 28i junior in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Eldorado2

    Eldorado2 New Member

    Having a few issues with shower going cold. It is ok early morning before 7am but after this time goes cold after a few mins.

    Would this be the heat exchanger or something else. Water pressure is weaker later in the day so wondering if this is the issue.

    Thanks
     
  2. townfanjon

    townfanjon Trusted Plumber GSR

    Just the shower ? are your hot taps ok ?
     
    • Like Like x 1
  3. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    If it's ok before a time it's not the boiler
     
    • Like Like x 1
  4. Eldorado2

    Eldorado2 New Member

    Never really have the hot taps on long enough. This has only started heppening over the last week or so since the massive pipe burst in Birmingham in the news. We are only a couple of miles away.
     
  5. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Could you try the hot taps for long enough?
     
  6. Eldorado2

    Eldorado2 New Member

    So the drop in water pressure is the likely cause?
     
  7. Eldorado2

    Eldorado2 New Member

    Just ran the hot water taps for several minutes and all was fine.
     
  8. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I would say it's the shower then
     
    • Like Like x 1
  9. Eldorado2

    Eldorado2 New Member

    Shower takes hot water directly from the boiler, would it be a thermostat?
     
  10. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Thermostat cartridge in the shower yes or could be the filters on the shower inlets as you've said the water main burst
     
    • Agree Agree x 1
  11. MARTIN LISTER

    MARTIN LISTER Pembrokeshire Gas Maintenance GSR

    Try turning down the domestic hot water thermostat at the boiler. The shower may struggle to mix properly if the water is too hot and the flow is reduced.
     
    • Like Like x 1
  12. dan_the_plumber

    dan_the_plumber GSR

    My guess is local water board have turned local pressure down. You may need to re calibrate your shower. Basically pull to temp knob off, turn it (past the stop) until it’s hotter, then replace the knob. Easy
     
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