Thanks to both again, I'll have a look at the pipework. There's quite a lot of old stuff hanging about so I'll track down their route and then look at your solutions,
again, many thanks - all very helpful
Rob
Hello,
I have a four year old Baxi 133 Combi boiler.
When I turn on the cold tap, for example, to fill a kettle, wash, etc, when I switch it off quickly (as one normally does) the boiler starts up as though it is doing a pre-heat - after about 20-30 secs it shuts down.
BUT, when I trun...