We live in a new build home and have a 11.2 kw ecodan air source heat pump . Radiators warming up in zone 1 ( downstairs) but not in zone 2 upstairs . All radiators have been bled . See pic . Zone 2 shows as on , can hear it working but no Heat to radiators ( can see difference between actual and target temp ) . This has only happened very recently after installers were here as some of the radiators in upstaters were not heating . They fixed saying that not all were ‘fully open’ . We had heat in all for a few days then it stopped . Can someone advise or guid please ? Mitsubishi have suggested it could be a valve issue that slits the flow between zone1 and 2 .
Best answer by Abby_OVO
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