On Sat, 28 Oct 2017 13:46:24 -0700 (PDT)
wrote:

I don't know the model at all. A very common fault is flame failure
thermocouple failing, result is that when you take your hand off the
knob it just goes out. Solution is normally a replacement standard
thermocouple, eg from toolstation. Your oven might use a different
system though.

When that happened to my boiler it was just that the cold end of the
thermocouple wasn't screwed in tight - easy fix, but I wonder how it
could have happened.