Whirlpool left front burner problem

I have a Whirlpool range model GPJ85800 with a ceramic cooktop. The problem is that the front left dual burner lights up on its own with the switch in the off position! After turning the switch on then off, the burner goes out but then comes back on a minute or so later. Is this a switch problem or could it be something more serious such as the control board? Please help!