Thanks guys. It loops like the filling loop was left on.
I've closed it and the pressure has dropped back to about 2.8.
It's still on the high side so will it drop back itself or should I bleed some water from the rads?
I could urgently do with some help. We had a plumber out to replace an overflow cylinder connected to our tank in the hot press as it was full of water and to replace the 3 zone controls for our heating and hot water.
The pressure on our Potterton boiler shot up from 1.8 to over 3 after he...
I've a Potterton promax 24 Combi Boiler which is about 4 years old. We turned the heating on for the first time this week since before summer. It's behaving really weird in that I can only get either the upstairs or downstairs to work but not both.
There are termostats both up and downstairs...