Glow-worm Flexicom 18 sx 'No demand for hot water/heating' can you help?

[covuk77]

Hello there,

I have a Glow-worm Flexicom 18sx boiler which has stopped working while we were on holiday.
I.E. everything seems fine with the controls & bolier but there is no longer hot water or heating on demand.

Now, as we were away, obviously nothing has changed, so I've tried to diagnose the problem myself and have got so far:

There is no error code message on the boiler.
A 'status' report shows s30, meaning there is 'no demand' for heating or hot water.
The 3 port valve seems to move as it should.
I had a quick look at the diagnostic reports and could see nothing wrong other than the 'no demand' problem.
All heating controls are on and seem to work as normal.
I have changed the 'Assembly housing' unit for a new one for no effect.
The pump seems fine, i.e. I turned the screw on the front and clean water started to seep out.

The only thing that seems strange to me (though I can't see how it would change just by being away for 2 weeks) is that if I test the room stat with a circuit tester, it appears that there is no power to the unit, which doesn't make sense to me, not being a plumber. However, that doesn't explain the lack of hot water on demand...

Can anyone help?

Thanks in advance.

 

[Dotty]

Yep, you need to call someone in.