Just inherited a Vokera linea 24 combi set up. The Radiators are working a treat Plenty of heat at #3 setting. The hot water does not heat up to my standard. Easy to put you bare skin under the running tap. The temp at the boiler unit shows 60 - 75 when running the hot water tap but doesnt deliver this ever. I have read about a blockage in the motorised value but dont know how to locate it as I have no diagrams. Is it possible the cold water pressure too high and is denying the flow of water from reaching the temperature I should expect? Baffled!