What do you have your Valve reporting level set at? I have it set at 1.
I have had the situation with the Spirit where it is telling me it is close at 0% but the Valve is still open i.e. the radiator is hot and not cooling; maybe this has happened here?
I am considering turning the Spirit Off rather than setting it to 8 deg C to force the valve to close but I am not sure that would help your situation.