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Thanks for the swift replies Gents. I have the in-laws coming to dog sit next week while we're away. I'll be in for an ear bending if we get a cold spell!? (Keep the bills low though!!!!) I spoke with HCS and their techy guy is mailing me the electrical test sheet, to ensure it is the valve...

Hello, yet another question regarding the dreaded 'ACL mid position valve'. I am a competant novice, but use simple terms please........When we activate 'water only' on the CH controller, the motorised cog on the valve turns fully in one direction and the central heating rads come on too! I am...