Checked out a Imperiel gas Lp.deep fryer the other day.Would cycle fine most of the time they say and did while i was there.Every now and again it run wide open doesnt cut of for any thing,operating stat nor high limit shuts if of,they said they noticed the prob after the nob on the gas valve started feeling different.I suggested to change the gas valve,gotem a price and they said let me check with the fellows that i get parts from,i said ok but its more if install parts that i don't furnish for i do make money on my parts.To many cheapskates out there.BTW they could shut the fryer down by fooling with the nob on the gas valve by cutting it to the off position.