Hi all, I have had my Harman P43 Pellet Stove since 2008. Up until this year I have had no major issues with the stove other then a noisy Distribution Blower that was replaced under warranty. Recently, I have noticed a reduced heat output from the stove corresponding to the Feed Rate. It has always been my understanding that the feed rate is like a timer. Set the rate at 3 and pellets feed for 30 seconds or so. Now, the stove is running much less then that. Today at feed rate 3 I timed the auger feeding for 12 seconds per minute measured over ten minutes. Not good. I shut the stove off. Unplug it from the wall outlet, plug it back in and it is currently running at feed rate 4 for 38 seconds. This seems to reset something. This may last for a few days, maybe a few more and then it will do it again. I have been barely able to get 400 degrees out of the stove as measured with a magnetic thermometer on the side of the stove regardless of the setting. The auger and the Red Feed Indicating LED correspond to each other so there does not seem to be any issue like the auger not running when the LED is lit. I keep the stove clean. I clean the stove weekly. I vac the flue inside and out. I am using 4" Excel pipe. I am running the stove on Stove Temp, not Room Temp. I would test it on room temp but I cannot find the sensor. Internet searches seem to point to a faulty control board or ESP sensor, but at this point I am just guessing. Anyone here with similar issues with their Harman over the years? I would appreciate any input anyone has. I just hate to throw money at guess work. Thank you in advance.