About 3 weeks ago I finished building my electric smoker. 36” high x 24” wide x 18” deep. The heating element I bought from amazon, it’s a 1500 watt with dial thermostat control of low, medium, high with a temp range of 50-450 degrees. I built this smoker for low and slow smoking as I also built a cold smoke generator for it too. My problem is After many tests to see the temperature range. Test 1: set on high and it would not even reach 120 degrees within the 5 hr test. Test 2: set to medium and the temperature reached about 150 degrees with in 5 hr. Test 3: set to low and it even got hotter, over 200 degrees. One day while getting ready to smoke some brisket, I set the dial control therostat in between low and medium. In the 6 hrs, and no mater what I tried, it would not reach above 134 degrees. Gave up and put it in the oven inside. Question: Can my heating element be wired in a way that I can remove the dial controlled thermostat to allow me to install a thermostat control PID unit? If so, how? If it can’t, where can I buy a direct wired heating element that would work for my needs? I need temperatures ranging from 100-450 degrees on a 120 volt system. Thanks for your time and help.