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Noisy Baxi 80 HE boiler

Discussion in 'Plumbing and Central Heating' started by khlv374, 10 Nov 2009.

  1. khlv374

    khlv374

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    I have an instant Baxi 80 HE combination boiler with preheat. The boiler is making a lot of noise during pre-heat and on call for hot water. It can be described by an aggressive cat noise but more prolonged. If you don't have the CH on for a while the problem goes away after a few days, but after having the CH on the problem returns. There is no noise when the boiler is in CH mode. I should say that the system is not that old. When we recently drained the system the water was not that filthy and the boiler is only about 3 yrs old so i didn't think it would necessarily be sludged up. I have read some threads about 'O rings on the diverter valve'. Could it be this (is there a test) or is it something else?

    Thanks, Paul
     
  2. baxpoti

    baxpoti

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    Without hearing the noise it's difficult but an aggressive cat (whinnying high pitched) could be the 'O' rings
     
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  4. kevplumb

    kevplumb

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    like it :LOL:
     
  5. baxpoti

    baxpoti

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    Ops description not mine
     
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  7. khlv374

    khlv374

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    Yes when i say aggressive cat it's probably more like tearing phone books in half, like a ripping/sloshing/swooshing, not high pitched.

    All other boiler operation is fine, just the noise on pre-heat/hot water.
     
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