

I was in the process of heating 25lt's of wort for my latest brew (stiff Squirrel) and the thing cut out

Checked the stat and it was clicking in and out so it wasn't that. Then a few minutes later it came in


Seems to get to 85°C cut out and cuts in after a few minutes.
Has anybody experienced this? is it a thermal cut-out problem? Is the boiler buggered?
You can't imagine what i had to do to boil 25lt's of wort, add hops etc to save the day!!! but i did it, but i was unable to use my cooler and so it's sitting now cooling waiting for me to pitch the yeast. Not sure how long this will take, or whether the yeast will still be OK once it's cool. Yeast is S-04 and has been made for about 1 1/2 hours now.