constant c

  1. Nat2000

    Ideal icos he24 boiler constant 'c' with banging noises

    Hi All, Our Ideal icos he24 boiler display constantly shows 'c' and the reset does not work. It heats up the water and central heating. But makes loud banging sounds when the CH demand is turning off. Then shows HA over heat error code. After few minutes goes back to 'c' and repeats. I think if...
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