Hi,
We have a cannon gas fire which has recently started to shut itself off
after only 20 mins of operation. Also, In order to turn it on, I need
to blow the flames (like a camp fire) so that it will stay on. Perhaps
this is an indication of the problem?

Before calling in an expert, are there some simple things that I can
check?

Also, there is some gold coloured grit which came with the fire -
anyone know what purpose this serves pls?

all help much appreciated.

Steve