Spartyon: I would call Cookshack direct. They are very good about helping out. You will be talking directly to the people that built your smoker. They will walk you through how to diagnose what the problem is. I don't know how long you have had your unit, or how clean it is. I have been running mine for a long time and need to clean it up again. There is a little probe that sticks out of the inside back of the smoker. Every time I have had any problems with temps, I either needed to clean the probe, or I had something to close to it.