My Mid pos valve going to middle pos for HW only - why?

cgullcharlie · 19 Feb 2011

When I select HW only, instead of being in position A (far left), my mid position valve is going to the middle and thus turning on Central Heating when there should only be HW.

It correctly goes to B (far right) for CH only. It correctly returns to far left when everything is off.

Why is it doing this?

picasso · 19 Feb 2011

do you have the "hot water off" connected in the cylinder stat and on the programmer ?

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My Mid pos valve going to middle pos for HW only - why?

cgullcharlie

picasso

DIYnot Local

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