I'm having problems with getting a smokey smell in the house when I use my pellet stove. It's a Whitfield Advantage Plus MH-116278 bought in 1998. I used the stove for several years and had the problem back then. I stopped using it in 2000. I did replace the door gasket once in it and it's been sitting ever since unused. I fired it back up and I could smell smoke coming from the top where it blows out the heat. I looked in the manual and it states that it could be the vacuum cleaner leaking. Where exactly is the vacuum cleaner? I noticed there's creosote built up on the outside of combustion fan. What would cause that? I never did a thorough cleaning of the stove. That's on my list for tomorrow. I did go over all the pipe connections and reseal the joints. Also, there is a pipe extending out from the back on the bottom. According to the manual it's the vent pipe. I started to route some PVC pipe from the vent tube to my cold air return on my furnace, but I can't feel any air being sucked into the pipe. The convection fan is what I call a squirrel cage. It's open on one side and isn't connected to the vent pipe. It draws air into it from all the openings on the sides and rear of the stove. What is this vent pipe for? I've attached some photos of the stove and the vent pipe. I placed a PVC elbow on the pipe to start routing it.