Has anyone installed a fresh air kit in a US STOVE 5502M? This thing has been a nightmare the last month. It worked fine for about a week, maybe 8hrs of use. Its in a finished detached garage. 3 inch vent going right outside to the T, then straight up about 4 feet. It stopped running, giving me Err 3 and Err 2 codes. I got it to kick on after about 15 minutes, but lately it doesn't even kick on, the fire goes out and I get an Err 3. I tried 2 different kind of pellets, typical Home Depot /hardware store stuff. I dis assembled the auger, vacuumed all the dust, and its definitely turning and dropping pellets. I did the initial test that's in the manual and everything does like it should except for the draft fan. It just blinks and never turns on, unless I open the door, and the fan kicks on and the light goes solid. No idea what that means. I called US stove and they told me to install a fresh air kit because its in a garage. (why did it work for a few weeks then stop, makes no sense). she told me that people install these stoves and they run incorrectly for months and its a mystery. Great. So I bought the kit, 69 FAK. and what she told me and what the instructions say don't match up to this stove. I don't see a cap that I have to drill holes in, I have a solid pipe that goes from the firebox area right out the back. Do I just attach the hose to that and go outside?