A couple of questions and I am by no means an expert at trouble shooting.
1. If you fire up the smoker empty in the dark, does the element have a uniform glow or are there some dark areas? If you have dark areas you may need a new element. - will look
2. Are the temps you are reporting read from the Auber or a separate thermometer? Auber If a separate thermometer is used, does it register correctly in ice water and boiling water? If from the Auber, you may need to do an auto-tune. OK, but all seemed fine until now without tuning
3. When using the Auber, do you have the analog controller maxed out to 250? Anything less and the Auber and analog will be in conflict. at 250
4. Is the Auber temp probe clean? prob not
5. Is the smoker's built in probe clean? where is smokers probe?
Thanks for suggestions