Wonder if anyone has had this happen? Having issues with the primary air damper on my Lopi Endeavor in that the rod is very difficult to move. It sticks, jumps and starts, which makes it hard to accurately regulate. The stove is only three weeks old and this has become progressively worse. It started just a as a noisy damper in the beginning, and this morning it was almost stuck in the closed position when I went to reopen it. The temps were about 550° when this happened this morning. It usually gets worse as the temps get higher.