I've got an ageing old Honeywell system plumbed into my house, and want to modernise it I've bought a Hive to replace it, and after carefully checking everything decided to replace. However the existing Honeywell brain (magic box) does all the work, e.g. the hot water cylinder has two wires that run to the brain, so isn't a standard 240v one (easy to replace). However the A/B valve is also wired into the brain and only has 2 wires, 240v neutral and positive, and the valve is all one piece (e.g. if I try to take the top off it leaks water)... So will I have to replace this with a more modern a/b/ valve (think 5/6 wire ones?) or is this usable? I can't figure out how it knows what position it is in... The motor works, not sure if the a/b does as my heating still comes on in summer... but the brain also has a couple of bad burn marks on it, so think bits of it maybe fried.
It's late I'm tired, that's probably useless info, but I can grab the info if more needed. Help welcome TIA
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It's late I'm tired, that's probably useless info, but I can grab the info if more needed. Help welcome TIA
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