Powermax 185 Buzzing

Joined
14 Oct 2008
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United Kingdom
Hi,
I've got a new problem with the Powermax 185, all works fine, but if you turn the central heating on now, a loud buzzing noise comes from what appears to be the programmer or possibly the PCB board.

Any ideas on how to solve it ?
 
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The buzzing remains, I got this once before but turned the boiler off then on again and it seems to cure it. Now its not intermittent and the buzzing remains whenever the heating is turned on, although the heating seems to be working fine regardless of the noise.
 

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