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Discuss Hot flow and return pipes, hot upstairs rad but cold rads downstairs in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Mark Garland

    Mark Garland New Member

    As in the title, the flow and return pipes both get hot when the heating is turned on, yet only the upstairs radiators get hot.

    I am very puzzled by this. Even turning off all thermostatic valves upstairs, none of the downstairs rads get hot. Our plumber says there must be a blockage looking for a second opinion. Not sure how there can be a blockage if the return is still hot.

    Any help would be appreciated.

    Mark
     
  2. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    How old is you pump and what boiler do you have mate?
     
  3. Mark Garland

    Mark Garland New Member

    It's a Vaillant ecoTEC plus 835. Is brand new, was installed in May 2018. Had been working great for the last few months, then we've had the heat off while its been warm but now is cooling down so heat back on and this problem has appeared.
     
  4. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Thermostats on all the downstairs radiators?
     
  5. Mark Garland

    Mark Garland New Member

    Yep and all turned up to max.
     
  6. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Remove the heads and make sure that the pins have not seized in the off position .
     
  7. Mark Garland

    Mark Garland New Member

    They were never turned off and worked until 2 months ago the thermostats on the downstairs rads havent been touched, just left on max. Also seems unlikely to me that tall of them would break at exactly the same time?
     
  8. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    was the boiler a combi before or conventional?
     
  9. Mark Garland

    Mark Garland New Member

    Always been a combi
     
  10. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    sorry mark
     
  11. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    It’s not your fault mate. Hopefully Mark can see that.
     
  12. Mark Garland

    Mark Garland New Member

    thanks for deleting the spam mate, some people really have nothing better to do!
     
    • Funny Funny x 1
  13. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    I would say it is time to get the engineer out back mate. Nothing else you can do without looking more in depth at the boiler.
     
  14. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    it gets frustrating trying to kock them back two more pop up
     
  15. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    right back to business how fast does the temp rise on the boiler?
     
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