Ok - been in my house a year and its got a new Potterton boiler, with std hot water tank, with expansion tank in the loft. I have always had a leaking over flow but if was pushed to the back of my mind while I ahd an extension done.
Anyway - know its doing my head in.
I ahve checked its not the any corroded parts n the expansioin tank, causing water to be filled up even though the counter balance is down.
What seems to be happending taking taoday as an example. Not central heating on - and we have on timer - several hours in morning and slightly more at night. So today its just hot water being timed on - and hence am getting overflow, upthrough the expansion tank and hence into overflow and then coming out the pipe at the side of my house.
What has caused this - air in the system?
Advice please so I can cur ir
Scott