Background: Breckwell P23 stove - have had for about 4 years, bought used. Has worked fine. Did a full clean-up prior to starting it up this year. Recently it ran out of pellets and I used the opportunity to vacuum out the flyash. I did NOT vacuum behind the small doors since it has only been running for 2 weeks or so. Loaded pellets into the hopper and turned it back on - heard an unusual "crunching/grinding" noise - don't think it was because of pellets in the auger but not sure. Stove ran for about 10 seconds, and I noticed that the auger was not turning as long as "usual" at startup. When the auger motor started to kick in a second time, the stove shut down. Waited a while and started back up again and this would happen again. Thought I may have damaged the air-flow switch when I vacuumed out the stove, so I put a jumper wire between the lines going to the air switch. Turned the stove on and it stayed on - and noticed the auger 'on-time' was longer than when it had been shutting off. Got the usual bit of smoke around the vent pipes when it was initially firing up and the then the pellets fired up. BUT - the flame looks "different" than in the past - kind of a lazy flame. And the smoke continued to leak around the vent pipe. Tried changing the damper setting but not much difference wherever I set it. Let it run for several hours, and then noticed a puddle of black water under the vent pipe near where it goes through the wall. And although we had a lot of rain recently, the stove was working fine during and after Hurricane Sandy (we didn't get hit that bas here in NH) The gasket to the door and pan appear to be fine - and again - this stove was working fine 2 days ago. No smoke leaking etc. The combustion fan seems to be working fine. The glass is getting soot and blackening up very quickly. Any thoughts or ideas of what's going on/what's wrong would be appreciated.