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All, I wonder if you can assist I have a Honeywell electronic timer system ( I do not know the model but it is about 7 yrs old), V4073 3-Position Diverter Valve, Honeywell thermostat. Anyway, over the past 2-3 weeks I have found that when I have turned the heating on via the electronic...

Hi, I have a Baxi Solo 2 PF. A couple of weeks ago the boiler has stated to make a 'buzzing' noise. The noise last for @ 2-3 mins and then dies off. I am not at all knowledgeable about boilers thought the noise is coming from the PCB (I think that is what it is called). I have...