Hi, thanks for using JustAnswer.com. It sounds like the thermocouple may be at fault. May I please have the model number?
Okay, this unit does not use a thermocouple. The rotissorie valve is bad. The part number is(NNN) NNN-NNNNand is part # XXXXX in the attached diagram. It is available at http://www.myapplianceparts.com/ or from your local parts retailer.