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honeywell valve buzzing noise

  1. 5

    Honeywell 3-way valve buzzing while boiler is off

    Hello everyone, The Honeywell V4073A1039 valve in my airing cupboard started making a buzzing noise late at night and early in the morning about 2 months ago. I bought and fitted a replacement Syncron motor a month ago but the valve started buzzing again last night. It's a sealed system, about...
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