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    Siemens DVA3 (3-port valve) body only replacement

    Of course it couldn't have happened in the summer... No hot water, traced to no hot going into the cylinder heat exchanger. I suspected that it is being caused a faulty / seized 3-port valve so popped the actuator off and tried to move the spindle by hand which it didn't. So I tried again...
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    Fanfare 30/50Si No spark

    Hi, its the usual story I'm afraid, cold weather starts and the boiler stops :( Yesterday set the switch from "Lo" to "Hi" and programmer from Hot Water to Hot Water + Heating, everything was fine last night and this morning but this evening it fails to spark. Starting sequence seems...
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    Replace Landis & Gyr MA-V322 Actuator / Motor

    I have a Landis & Gyr MA-V322 3-port valve which is making a clicking noise when CH is selected but not moving (and boiler does not fire unless HW is also on). I've taken the motor off and the valve arm is moving freely (spring loaded to return to HW position). The gear on the motor...
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    Grundfos 15/60 Pumping Downwards

    I am just about to replace a 22 year old and very noisy Grundfos 15/60 with a new pump (the same model). All other components in the unpressurised vented system are as installed by the house builder in 1989. Everything has been cleaned, flushed inhibited etc. In the install instructions it...
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