I just found an old thread which seems pertinent to my predicament:
"Well after three nights of failure, I finally got it.
First I tried going to wood charcoal and less water in the pan. This resulted in a temp around 190. So I gave up.
Next night I figured it was not getting enough air, so I placed a variable speed fan at the bottom vent and pumped in steady air. This resulted in 200 degrees. So I gave up.
Tonight knowing that it was not the fuel or air, I looked at the set up. I took the bigger pan and turned it into the charcoal pan and drilled holes into that also. Since I had swiss cheesed the other pan it was not good for water, so I went and bought a new pan and moved 3 inches farther away from the heat source.
Success!!! I giggled as I saw the temp steadily rise to over 300 degrees, I then started adjusting the vents to get the smoker to balance out to 250 degrees and stay!!!! I am so happy.
The distance between the coals and the water pan seemed to be the issue, this would be why I was going through water like crazy and no heat. In the last 2 hours the water has barely dropped.
So tomorrow I am getting out the grinder ond moving the shelf supports to allow for the setup I was using tonight. Then I will be set.
Too bad I have to change it right out of the box, but I am getting what I wanted now while learning more about how the whole system works."
The water bowl does seem to sit very close to the charcoal. I think it may be worth my while trying to raise it slightly.