We have a problem with our Thetford fridge, it is one of the smart models that switches supply, this one is too smart & turns off. What is happening is it won't stay lit on the gas. I have taken the cover off the outside & I can see that it is lighting but after about 30 secs it goes off with the error message 9. The gas is full & it is propane, it seems to light ok bu it is as if the sensor isn't detecting the flame. It is a problem in that I am writing this on the ferry on our way to Dunkirk, the van is a new van & it was working ok when we last tried it. Hoping to get to somewhere tonight with a hook up but wondered if anybody knows any simple solution as I can try until I can get to a service agent for Thetford, I have downloaded a list of the French ones.