I have a Potterton combi boiler which was serviced only a month or so ago.The engineer advised me to keep an eye on the pressure.I 'boost' the pressure to 1.5 bar as advised then almost immediately it drops to 1.0.Over a week it drops to the red zone and needs topping up.
Why is the pressure dropping?
Do I need to get an engineer out?
Any idea on cost?
I have a service plan with B.G. that covers the boier but not the radiators e.t.c.
Any help is appreciated.Thankyou in advance.