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    Ravenheat HE120t low nox error code 28 problem

    can anyone help with this puzzle i have a ravenheat combi it displays a code no. 28 . After a reset it goes through its normal sequence then after approx 3 secs it locks out displaying the above mentioned code .the first thing i checked was the pressure it was at just over 1/2 a bar so i...
  2. K

    ravenheat he 120t low nox

    can anyone help with this puzzle i have a ravenheat combi it displays a code no. 28 . After a reset it goes through its normal sequence then after approx 3 secs it locks out displaying the above mentioned code .the first thing i checked was the pressure it was at just over 1/2 a bar so i...
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