Would be grateful for any advice, Halstead Quattro Gold combi central heating boiler 17yrs old, loosing water pressure at a rate of one tenth of a bar per week. Leak stains which appear dry(please see attached photos)around diverter valve that situated o the right of the boiler but dampness underneath the boiler on the left Is it time for a new boiler of any advice on how to fix it? Thanks
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