Oil heatslave 2 no heating

[Taffyo]

Hi all , retired plumber here needing advice
Just moved in to a house where a 1 year old green star heatslave 2 12/18 Geordie oil boiler is installed
House has been empty for 5 months so technically the boilers hardly used

Switched on pressure is fine , hot water fine but the heating is not going round , boiler fires up , flow heats up , pump is going , on the older heatslave I worked on it was usually the 3 way valve not operating .
Totally different set up this new one

Any ideas , do the valves stick on these ones ?

 

[Deleted member 120897]

• Is the boiler radiator temp set high enough?
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