Purchased a Jotul F500 new a couple of years ago. We heat the house with it 24/7. The slide control on front does a great job of regulating the fire size. Starting a few days ago, the heat output has been quite a bit less. I can crack the side door or ash door and get a great fire going, but it slows down significantly when closed up. The front slide control is still working, but there doesn't seem to be enough air getting to the fire. Hottest temp reading I'm getting with the doors closed and damper wide open is about 312f degrees
Troubleshooting- I swept the chimney and it wasn't bad. I cleaned the flue pipe from the stove to the chimney and that wasn't too bad. I cleaned out the exhaust end from the stove. The creosote wasn't bad. I emptied the ash tray. Checked for blockage above the heat tubes. I unbolted the cover in the stove for the air damper and vacuumed then blew it out with compressed air. I'm not getting any unusually high smoke coming out when I open the door. The cleanout door in the cellar is closed. The wood I'm using is exactly the same from the same tree I've been burning all season. I'm at a loss as to why it isn't burning like it did.
Troubleshooting- I swept the chimney and it wasn't bad. I cleaned the flue pipe from the stove to the chimney and that wasn't too bad. I cleaned out the exhaust end from the stove. The creosote wasn't bad. I emptied the ash tray. Checked for blockage above the heat tubes. I unbolted the cover in the stove for the air damper and vacuumed then blew it out with compressed air. I'm not getting any unusually high smoke coming out when I open the door. The cleanout door in the cellar is closed. The wood I'm using is exactly the same from the same tree I've been burning all season. I'm at a loss as to why it isn't burning like it did.