I have a heating engineer here now. He has serviced the boiler. Part of this process increased the temperature dramatically. There was no discharge from that copper overflow pipe. It didn’t even get warm. I think that staining on the outside wall is from years and years ago and the previous boiler.
He’s going to do a power flush and add inhibitor.
I’ve asked him to do the air pressure test but he is reluctant. He said that will just tell us we have a leak. I said then we should isolate different parts of the pipe work and eliminate sections in that way.
He said we are doing the same thing with water and using the pressure gauge on the boiler.
He wants to dig up all the floors as well ! When I pushed him further he mentioned thermal imaging. Now he wants to put a sealant in the system. I
I really want to find the leak.
Does anyone want the job of finding this leak ? I live in Walsall just north of Birmingham and make good bacon sandwiches