Was that 280° reading from an accurate Therm, or from your MES?
If it's an accurate therm, be sure to shut it down if it gets to 310°, and keeps going.
I agree, if they won't help you get squared away, I'd go with the PID.
It was from an accurate Threm. I did shut it down at 280 . I called
Masterbuilt and they said to replace the controller. Just for grins I took the control unit off, cleaned the plugs and now it seems to be working fine. We shall see what the future brings.
I was trying to smoke a corned beef for pastrami when this all happened. So I did a cold smoke on the corned beef for 3 hrs. then put it in the oven at 235. It's reading about 265 now so hopefully next week we're gonna have some Pastrami sandwiches.