No official system, but when we are done cooking we always leave the top open to let it cool before covering it. So, we have to go back in 30-60 mins to cover it, and if its still hot we know we left it on (I've never done it myself, but the wife left one burner on once).

LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7