JB, THe only way that I finally solved my problem was to attach a capacitor to the positive leg on the output of each thermocouple to ground. I used Al caps which take the heat fairly well. about 50 Micro F 100 wvac seemed to do the trick. Good luck with yours. Scott Thank you very much for the inf...

Hi You could try and see whether the unit is picking up the interference or the thermocouple leads. (E.g. run the oven up to temp that causes problems, with unit in normal position but leads not in the oven – are the readings affected?) If the unit, it could be placed in a grounded metal box. Scr...