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Hi, I hope someone can clarify if i've worked out the correct understand of how a motorised actuator works: I suspect i have a wiring problem with my 3port actuator: Myson MPE322-3 port 22mm Spring Return Valve on a y-plan system. I would like to ask your advice so I can contact a plumber or...

when i experience the problem of hot water and the central heating not warming up or switching on - i found the problem to be - the motorised 3port valve - either the mechanical valve is stuck - in the hot water only position or the electrical actuator valve head burned out (this is what i had)...

I checked the mechanical valve and its free to turn easily by hand - thats why i think its the electrical wiring somehow - even with everything switched off, the valve is still receiving power. Yes i wired it same as the old one........so yes i guess this one will go the same way unless i...

Help! Recently i had a problem with the Potterton motorised valve (type MPE322 - 3port) fitted in my central heating system. The hot water would work OK but the valve would not motor open to switch on the central heating...........SO.......I replaced the actuator with the identical model...