Hi, Blue. It's set to hit 80 degrees which it probably does after 5 hours
I'm likening it to boiling a large pan of water on my littles gas ring on my hob i. e. I will boil eventually, but takes an age.
There are no settings that differ from those factory ones shown in the manual, so assuming it should work out the box, i can only conclude there's a fault.
It's been an interesting process, but it looks like I'll have to get Intergas out to take a look now unless anyone has any other ideas
Thanks everyone
G