I have a model 55 (built in 2008) that turns on and starts to smoke and warm up then then the temp drops. This is my first time using the smoker and I didn't have a thermometer when I did ribs a couple of weeks ago and it took a couple of extra hours to get them "done". So, I picked up a good thermometer and thought that I would give it another try and be able to track the temps. Tried to do a pork butt and after 8 hours the meat temp was in the low 140s and the smoker temp was in the 150s. I tried turning it off and unplugging and re plugging it in and the smoker temperature never really got higher than 170-180 and the meat has not gotten about 147. What could the problems be? Is this something that I can fix (would it be the heating element and or the thermostat?). How difficult are these to replace? Are they worth replacing?
Thanks in advance for your time and help