I'm used to it heating up to get the wood going and fluctuations around the set temp during a long smoke but this was 2 hours in on the bacon I was doing and it shot up to 245F which I thought quite high and the oven thermo I had inside registered the same. During most long smokes I just ocassionally glance at the readout. I've had a sneaky suspicion that it might be running hot. I'll just put a Butt in and really watch the readout throughout the smoke.