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Thanks for the comments/suggestions. I am not staying at my daughter's (where the problem is), so I won't be able to look at it all again for a week or so. but from memory, both sides of the valve get hot at the same rate. I don't remember if this is the case if I put it to heating only. I will...

Hi This is a house that they have just moved into. there isn't any form of isolation; the gate valve looks more recent than the rest of the install. My only other thought was that maybe the valve head is 180 degrees out. i.e, put on the wrong way, but I can't think that's the case. I haven't...

I am trying to figure out what's going on with my daughter's heating system. It's on a 3-port Danfoss valve HSA3. The problem is that when in hot water mode, the radiators also get hot. I took the head of the valve and have checked that the motor moves into the 1/8th position as well as the full...