A) problem - vaillant boiler (pressure system fault ) First of all : from starting the boiler pressure rises to 2.5/3.0 pressure ( safety relief valve open) releasing pressure to 2.5 . Boiler modulate between 1.5 /2.1 When the boiler is (on) .
B) Problem : pressure is down , if the boiler is switched off for an hour . Pressure down to below 1.0 recommended mark .
I have carried out some tests as of isolating the boiler and tested radiators for leaks are OK By fittng a pressure gauge . Pressure relife valve ok too !
Have you any ideas please!
B) Problem : pressure is down , if the boiler is switched off for an hour . Pressure down to below 1.0 recommended mark .
I have carried out some tests as of isolating the boiler and tested radiators for leaks are OK By fittng a pressure gauge . Pressure relife valve ok too !
Have you any ideas please!
