Diagnosing CH controller/valve problem - quick sanity check
"Roger Mills" wrote in message
...
That's why you have to remove ALL power in order to re-boot it - so that
it doesn't even have a HW-off signal. When you remove the power, you can
often hear it whirring back to the HW position.
Why are they designed that way ? and not spring loaded back to the Heating
position
if the sync motor fails at least you would have a warm house
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