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Recent content by Chris Hart

  1. C

    Strange Noise at high temperatures

    Hi. I have a Vaillant ecoTEC plus 418, about 2 years old. When it's heating water, it behaves and sounds normal up to about 65c. Over 65c it makes a whirling, vibrating and maybe resonating dull noise which gets louder as the temperature gets towards 70c. As a test, I turned the temperature...
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