My sisters house is fitted with an Ideal Classic boiler and a Danfoss Y-Plan. In order to get hot water she has to switch the CH on. I changed the actuator on the 3 port valve which made no difference. The boiler will only fire up when the CH is on. Any ideas?
Danfoss HSV3 (I think) with HSA3 actuator. Valve can be operated manually but boiler won't fire up with it set to auto with the DHW switched on on it's own.
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