Roy,

Thanks for the response

I always shut the 12v system down after use as that was the instructions from Murvi.

The Eberspacher heating is on a separate panel but is also dead - so I am assuming the 12v supply will be from the Kingass unit as it was working earlier on the week when I gave it a run.

I will connect up to the Mains today and see if that makes any difference.....

Kevin