I have read several threads with similar problems, but didn't see a clear cut solution...
What do I do to generate smoke with temps around 170 in the smoker?
The amaze-n is a cold smoker, meaning it smokes with very little heat. It can be used in a smoker up to about 300˚ before the pellets or dust start to burn up from the heat. The problem with trying to maintain temps below 200˚ AND smoke in a smoker is that the 2 are somewhat mutually exclusive. The Amaze-n will smoke no matter what, completely regardless of the smoker temperature. Todd Johnson is a forum sponsor and the vendor for the smokers. There's usually a link on the front page.
If your gas valve is anything like the valve on my cheap brinkman, you have to push in to turn it off. On mine, if I push in and slowly turn the valve it will lower the flame beyond the low setting. Not sure how low it will go before the danger of blowing out, but on mine I have to do that to get below 250.