Recent content by clivepage

This thread is so old I've lost track of whether I started it. If I did, the problem was S.53 error codes on my Vaillant boiler. I solved it by two measures, first throttling back the boiler to produce only about 18 kW of power, and secondly using a radiator cleaner to flush out the gunge in...

Good point - I'll try reducing it further. At most we have about 9 radiators going at once. The suggestion of a valve in the cylinder coil circuit is also good, I'm sure. Next time I have to drain the heating system for some other reason I might put one in. For the moment, it's working...

This is a bit puzzling, as when they start up from cold the inflow is bound to be pretty cold, maybe 10 C in a cold house, whereas the hot will be, well as hot as the boiler can manage. Anyhow, our boiler gave me the S.53 code several times over when we came back to a cold house after a...