We have three rads that remain more-or-less stone cold (and they're full of water, they don't need bleeding) while some others are very hot and others just warm. I've read up on the technique for balancing and the need to make a list of the order in which the rads warm up, because that's the order you follow when balancing - but what about the ones that stay cold? Does it matter which order they're done in?
Two are downstairs and one is upstairs, if that affects things.
Two are downstairs and one is upstairs, if that affects things.