But why should you only bleed radiators when the heating is switched off? Is it simply so you don't burn yourself?
Just a guess. When they are off the water is settled. If they are on the water is moving and possibly suck air in? Honestly don't know
Or another thought. Air eventually rises to the top when off. But if on its getting shoved though all the pipes and you never really get all the air out. I like this one better. Sure a plumber will be along soon to tell us lol
I'm liking your theories, they're very scientific. Problem is I always forget to do them when they're cold so I like to just pretend it's only so I don't burn myself
I've always been told to do them in the summer when you don't use it. But always forget and then think **** when we start firing it up towards winter. I've done it again his year as it happens.... grrrr
Shouldn't really matter if your just bleeding the air out the radiators. But if you then need to repressurise your system, this should be done cold.
Off apparently. Just googled it and the majority say off with the exception of uswitch http://www.baxi.co.uk/information-a...m-maintenance/how-to-bleed-your-radiators.htm
When I moved in my current house they obviously hadn't been done for years I did the one in the littl bedroom and it started pissing water everywhere. I guess you wouldn't have wanted that water to be hot.
Deffo off Usually you find the highest point in your system and that is where any air ends up so you shouldnt really be needing to bleed every radiator every time. The most important thing though is to check the pressure on the boiler. Most modern ones will tell you how many bar the system is with a min and max zone marked ( usually 2-3 bar I believe - but dont quote me on that) and there is a tap or knob that lets mains water in to the system to re-pressurise (a bit like pumping up your tyres when they are low) I am not a plumber but when we had a new condensing boiler fitted a few years back the plumber showed me how to check the system between services.