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Trying to start a new cycle , will not move off initial pump out step . Very little water at bottom and does appear to be pumping out (poored a cup of water in) i have removed rotor cover and it is spinning freely . i have blown back down drain pipe(disconnected it at sink) and it was quite...

When demand for h/w , boiler kicks in and off again after about 30 secs , then back on then off and so on . C/H loop works ok but overpressurises and opens up relief v/v , so i run it at a lower pressure to compensate. H/W temperature is adequate when c/h is on as heat in boiler warms cold...