ecomax 835

  1. C

    Vaillant EcoMax 835/2 f25 and f32 faults

    Hi, Have bought a house and inherited a Vaillant EcoMax 835/2 boiler, about 10 years old. Seemed to be working at first. However it started to give f25 faults and now alternates between f25 and f32. You can clear the fault and then it might work, but sometimes it takes 3/4 attempts. When set...
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