Harmon distribution blower

If your stove is on AUTO, which it looks like it is, it should be shutting down once your room is up to temp. Are you giving it enough time to realize things are warm and it's time to shut down?

Yes, if it's set to AUTO, the stove should shut down after a short time when the heat requirement has been met.

I think you can set it to STOVE TEMP and the blower should stay on, but you're likely to overheat your space, and seeing your concerns seem to be save pellets, that isn't gonna be your best option.

The p series can radiate a good amount of the heat of a small fire so letting the stove run is a good option in cooler weather as it will ramp up and quickly to keep a larger area from having a large temp swing and save on igniters

I turned the dial down to 55 about 45 minutes ago and no change.
I'm not sure at that low of a setting if the blower will ever kick on much at all.
I mean it appear to me the higher the temp u set the more the blower will run as opposed to the lowest settings.. I don't know. maybe I have it backwards..
on Room temp/Manual or Stove Temp/Auto once temp is reached, both settings will go into a low maint burn Dribbling a few pellets to keep fire going but the Dist Blower will deffinilty
shut off for a while...
The ESP on Stove mode or the Wire Temp probe on Room temp sez Ok. Temperature has been reached.. Bye.
But to answer your original post, I know of No way to keep the blower running constant..
I used to think of it as a waste of pellets also[Maint Burn] but the stove would cool down so much on Room/Auto, [high flame/low flame/No flame that to bring it all back up again to me seemed like a bigger waste. Not to be confused with days where the Sun warms up and stove would be off for most of the day in Fall weather. That would be a savings on pellets..