Have a PS40 that begins start process but will not stay lit and eventually you are left with a burn pot full of pellets and no fire. Have replace POF switch and closed down the damper to about a half inch. The stove is brand new and clean as a whistle. The pellets seem to fire up close to the igniter but the fire does not spread throughout the burn pot. Still plenty of air getting into the pot as evidenced by the blowing embers. Eventually however the igniter stops and the process slowly dies with the POF never being activated.
Murph
Murph