Quote Originally Posted by yetibear
I went to my local supply store and they sold me a "speed controller" which I was told would work but when it's set on the lowest setting it wont kick on when the timer turns on my system! I have to actually turn the knob on the controller to kick the can-fan on? I asked the supply store and was told that it (the controller) has to have a certain amount of amps or something to kick on the can-fan?? and told me not to set it at the low setting but more like half way! but at that setting it doesn't allow enough heat to build up inside the tent! any suggestions? thank you.
Couple questions come to mind.

How big is the tent?
How big is the fan?
Is there one fan, or two? (not counting circulation fans, just exhaust)
What type of speed controller is being used?
How is the airflow being routed? Are the tent-air and light-air on two separate circuits?

I've never had a problem with a speed controller_not_turning over a fan, even on the lowest setting. If you have a proper speed controller and everything else is in order, the quickest fix may be a simple baffle to limit/control the airflow.

*Merry Christmas*