Grill won't stay lit

I had this issue years back with another brand. What transpired there was the "push in" travel had over time become restricted, so the fail safe feature in the gas valve was not fully setting.

I discovered this by pulling off the knob where then it worked properly. I cured it by pulling just a little spacer into the knob's stem hole [very small bit of crumpled aluminium foil]. This spaced the knob just further enough out from the fascia enabling the stem to be fully pushed in and set the fail safe feature.

 If the pushed in knob is clear of the fascia then clearly it would not be this problem. But if it seems to be restricting things a one minute test by pulling off the knob would determine if a similar issue is happening in your case.

likewise while having the caravan serviced the engineer pointed out that the grill would not stay a light he gave me a quick demo he then removed the knob put in some packing refitted it bingo

The problem with my Thetford Aspire 2 grill is that it will show a slight gas flame when the knob is pressed in, but as soon as you release the knob it goes out.  It seems to act very similar to the gas running out but I know it hasn't as the hob and oven work OK.  Strangely it worked in the morning perfectly but didn't work at all in the evening.  Is this likely to be a quick easy fix or a dealer fix.  Hopefully not the latter as I am in the Netherlands for the next 5 weeks.

How has this old subject reappeared on the opening page!!!!!

was wondering that myself. spooky website this.

I've got exactly the same issue with the same oven,have had since new, 2015. You can replace the thermocouple without removing the oven as I have done this. It worked for a while then eventually stops working again. It seems to gradually get worse and worse until you have to hold the button in and burn your fingers. Nice 'safety' feature!

The thermocouple does sit on a moveable bracket of sorts so you can gently bend the tip into the tip of the flame, but each time I do, it works for a bit then after a few days I think the heat anneals it back out of whack. Use a hollow tube to hold the thermocouple body, not the top.

I've tried all the cleaning in the world and none of it helps.

I think it's a design fault and we should all get together and demand Thetford fix it.!!

Update having just tried to fix it. Again.

Once I'd bent the thermocouple into the flame again it says on. So in response to a couple of other reports, I tried blowing on the flame to see how sensitive it actually is. The answer is not very at all!! I blew and blew and it stayed on. Eventually I managed to blow it right out and guess what? The gas kept flowing. I could relight it straight away just on the ignition.

If I left it for about four seconds, I got the characteristic 'clunk' as it cuts off at which point gas stopped flowing. So the gas was flowing with NO flame at all so it surely can't be temperature related. I'm therefore suspecting a poor earth return and perhaps moving the thermocouple fixes it temporarily.

Having replaced it myself (and being an electronic engineer) I was shocked how awful the engineering of it is so I'm not surprised. Will report back on how it goes, but this seems to prove its not about the flame position.

and now it's done it again

I suppose that, by now, the gas has run out any way 

Nope but I still have the problem. I have just put it down to poor design

I just persevere and keep re-lighting it. Eventually it stays on.

peedee