Maybe? I'm really not sure where it comes from to begin with. I can reproduce it in my kitchen if the probe sheath touches the metal of my toaster oven despite my probe being isolated (no continuity from the sheath to either of the thermocouple pins). That system works perfectly with no noise at all out at the grill or if the sheath isn't touching the toaster. How to get rid of it is just a giant mystery to me.