I have A vaillant boiler and I cannot increase the pressure. I have done this in the past by turning a key and there is a sound of water and the gauge increases, this isn't happening.
Lou
January 2012
clean with WD 40 might be ok new one cost £85 to 120,
ltd
January 2012
that's to do with fan ,dirty fan connection might have to replace it or short cut stray WD40 on fan spindle to clean might work,to replace fan not DIY job
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