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  1. V

    Vaillant Ecotec 937 Plus - very little and inconsistent hot water

    A title correction after realising my error, acknowledging the assistance offered, and apologising.
  2. V

    Vaillant Ecotec 937 Plus - very little and inconsistent hot water

    I'm such a numpty - it is indeed an ECOTEC 937 PLUS - not an 837 - sorry to have wasted your time and kind help - so would there be other things to check?
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    Vaillant Ecotec 937 Plus - very little and inconsistent hot water

    Thanks chaps, the cold water supply is a much higher flow rate - the low HW flow output is recent. It's now cycling through to S26 and then the flame symbol goes out. No hot water. No fault code. No clue. if by the 'filling loop' you mean the two grey taps underneath, then yes - they are both...
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    Vaillant Ecotec 937 Plus - very little and inconsistent hot water

    Hi - the combi generally works well (F22 from time to time), no fault code displayed but very little hot water coming out of taps/shower - it's hot but just a trickle. Have just had some work done in the house including a radiator removed - heating is off though. Could it be heat exchanger needs...
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