We are new owners of Countryside 3500L. We have been burning this unit for 2 weeks now, we are located in Ohio and temps have been ranging 40's daytime and 20's nighttime. The stove is currently located in a 16x15 room with connecting rooms on lower level, apox sq ft of 1200, home circa 1847. We installed the stove thru existing fireplace opening attached to a 25' 3" flex liner up brick chimney. Unit also has a 6" fresh air intake installed. Since we started burning the stove we have never been able to get the room temp above 66 degrees and it has been as low as 56 degrees at times. Measuring the temp of the air coming out of the front of the unit has ranged between 150 degrees and at the hottest 300 degrees. We started burning with pellets and decided to try corn since output was way below what was expected. Corn and pellet mix is what got us up to the 66 temp and the 300 degrees blower temp. I have contacted the dealer and they have said we should be roasted out of the room we are in. We have tried 3,4,5 heat setting and there seems to be no changes. We have disconnected unit placed it outside, no changes in temp. Damper in, damper out, damper changes constantly to see if we can get some actual heat no luck. Stove will go out on 1 setting. Also checked the fine tuning knobs and they are not set at factory 1. They will blink at like 12. Tried adjusting them, lowest blink count I could get was 6. Dealer said he thought the fine tune knobs are there just to piss you off and has never been able to get them to work. Dealer also said that we should just experiment with the damper till we get it right. We bought the stove out of state cause we got a impressive deal on it and could afford what we felt was a better quality stove for the same money as a poorer quality stove. Now we are here with really no help. I'm at a complete loss as to what we are doing wrong with the unit. Any advise would be wonderful. I have spent days researching every page and video and still have no been able to find a answer. Please help.