grants vortex e21 external oil fired combi boiler getting to hot

[pete.b1]

Any one out there please help me I have a grant vortex e21 external combi boiler that loses pressure once a day I have replaced expansion vessel PVR all auto air vents but the PVR just dips once its hot the pressure never goes over 2 bars but I cant seem to turn down the temperature you cant put your hands on the radiator s because they are to hot it has no effect on the heat they are putting out even if I turn the boiler stat right down. The system is only just over 2 years old

 

[simond]

Still under warranty then? Where did the installer go?

 

[leakydave]

Are the thermostats fitted right down into their pockets? If they have worked loose they may not be detecting the full temperature of the boiler.

 

[pete.b1]

Unfortunately not still under warranty and as for the guy that install it no where to be found and yes thermostat right in cheers