Hi Peggy. The Leisure Line power vent system has a vent motor speed adjustment as well as a barametric damper. It also has a fume switch, that will shutdown the stove if pressure is lost in the combustion chamber i.e. the power vent speed is too slow or there is a restriction in the vent piping. Since you have not indicated that the fume switch is not causing your stove to shutdown, the power vent may be working properly or it is not, and the fume switch may not be installed correctly. I WOULD VERIFY THIS FIRST. To test this, unplug or turn down the speed of the power vent while a fire is going. The feeder, combustion blower, and convection blower should all stop within a minute or two.
If this is not working properly, you must repair it before continuing operation of the stove!
Next, you should adjust the speed of the convection blower so that sufficient draft is developed for the full operating range of the stove. Sorry, I do not have the Leisure Line power vent instructions handy, but in general the draft must be set so that at high firing rates all gasses are drawn away from the stove and out the power vent with the barametric closed. (Including drawing fumes from the fuel hopper.) Once the speed is set it need not be adjusted again. This is meant to get you started in a safe and fumeless direction. Finer adjustments to the power vent speed and barametric damper can be done to increase fuel economy. We'll save for a later date.
Everything above is on the assumption you have a power vent.
Hope this helps.