I still think the stove is not burning good the flames in the pic look like they are lazy and sooty. when you say you cleaned this stove did you pull the combustion blower and clean the chamber and fan blade? pull the impingment plate and clean the path down the back of the firewall? has the vent pipe been brushed and cleaned? from what i assume you run on low heat most of the time, that is the hardest thing on most stoves, run it on high every now and then. here is why i ask if it was getting more air through the stove it would burn the pellets quicker and you would have more control of the low burn settings. ESW 25PDV and 25PDVC have to stay clean or they burn erratically and your is as erratic as i have seen on here. they are one of the best candidates for the leaf blower cleaning because of the hidden passages in the stove.