my baxi pressure bar goes upto 3 when i switch on the radiatoes?
normally my pressure bar is under the 1 and when i swithch the radiators on it works its way upto 3 into the red. otherwise it gives me hot water when i whant and the radiators work ok. how can i fix only the pressure bar.
my baxi is the model combi instant 105e
fil, November 2007