John, a lot of stoves have issues with a 1 burn rate. The easiest solution is to run on 2. If on t-stat, having the air damper set properly is important. With more Empress inserts, put the air damper all the way left, then move to the right about 3/8-1/2 inch. If its too far left, sometimes vacuum will be reduced enough on 1, and the stove will shut down. Sometimes too, on 1 if the exh temp falls enough, the proof of fire switch (especially if its dirty) will cause the stove to go into shutdown. On 1, if the damper is open too much, temp will drop and pellets burn through too quick, to sustain operation. Its an experiment to find where yours is happiest at. I find softwood pellets (Okies, Spruce Pointes, Cleanfire) to burn and heat the best. My two Enviros love em, but I will tell you, the EF3 will adjust to anything being analog dials for continuous adjustment of feed and air control. Good luck with yours. The Whitfield is model dependent, which one do you have?? The Adv-II is one of my favorite stoves, a super heater.