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faults with potterton prima f boiler?

When we turn the heating off the boiler will not fire for hot water. turn the heating back on and water comes on. we have 2x2 motorised valves
Lizzie, July 2009
how do i light the pilot light

ann, January 2010
you have a faulty hw zone valve.
you'll need to do some checks with a multi meter.

either the micro switch is faulty or the valve has jammed open.

hi-spec plumbing & heating (essex), July 2009
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