I had my boiler serviced the other day (Potterton Performa 24).
Since then I noticed that the overflow is dripping (cold) and the pressure is high (3 bar), so I've called the guy who serviced it back.
Way out of my DIY depth, I've no idea what's going on here. Looking around the internet I guess this is some Pressure Relief Value / Expansion Vessel problem.
Could this have been caused by the service? Or could this just be coincidence?
Tia