C.O.
if the coil had grease on it from something else- transfer from the bottom of the kettle - it can catch fire...
If there is debris in the grease/burner pan - dust, food particles, etc. can heat up and burst into flames as well.....
if the coil has been submerged in water - it will blow a circuit- overheat and catch fire....did that by accident once - man that was a mess!!!