Hi Steve,
We had what is known as a light back or flash back. When I turned the Cadac off there was a noise and then a few mins later we noticed the plastic shield and knob in flames and was melting. Cadac have said this has happened before but usually the connector has only been tightened by hand but my husband had tightened it with plyers. When I phoned Cadac they were really helpful and said they would send out a new burner we had it within a few days. I then contacted them again requesting to purchase a new gas connector and they said no problem they would send one out foc. I received this in the post the next afternoon. I could not fault Cadac on the after care we have recieved and would reccommend them to anyone.
Karen