OK - seem to have got to the bottom of it all.
Just noticed now that whilst it was working, the burner and pilot were clicking in and out. So hats off to all those people who said gas valve. I would say I have a valve or pressure problem. When I turn the control knob down it seems more...
OK managed to get it to go wrong again. Tried whacking - firmly but didn't want to break anything!! Didn't work.
However, as usual, just turning it off and on at the timer and it springs back in to life.
Also this time the HW wasn't on - so this is exactly what happened:
This morning...
Thanks will do - just taking it apart now :)
Bah - always the same with intermittent faults. It won't do it while I am watching!
Left it running, I'll post back with the results later.
Thanks for the pointers so far
Yes, the pilot light is lit and the fan is on.
I can get the valve checked, but if it was sticky, I am not sure why it would start working as soon as I turn the HW off and then the CH back on again?
I have a Baxi Solo 3 60 PF (41-075-07). It has been working fine for a few years now, but has recently started playing up.
What I think is happening is as follows:
First thing in the morning HW and CH come on together all works OK.
At some stage both turn off normally(everything up to...