baxi duo tec keeps dropping pressure?

he takes some readings and that about it.
Lol..."poke & go"...as opposed to full service,snap the ignition lead,replace the combustion chamber gasket,damage the fan connectors,,,take half a day to mend,,charge customer £300 and leave..Yes,top idea this "full service' bolox...When boiler was absolutely fine to start with..People do like to make out that a combi service is akin to a major service on a car
 
Lol..."poke & go"...as opposed to full service,snap the ignition lead,replace the combustion chamber gasket,damage the fan connectors,,,take half a day to mend,,charge customer £300 and leave..Yes,top idea this "full service' bolox...When boiler was absolutely fine to start with..People do like to make out that a combi service is akin to a major service on a car
Nope not really but the expansion vessel should always be checked and not by pressing in the Schraeder valve to hear if it hisses
 
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