Help I've been an owner of an Avalon Astoria for approx 8 yeas ran great but now it seems like there's to much air even with the restricter closed fire still burning out I use it mostly on the 2 nd low setting with no problem also the combustion box were the fan mounts gets hotter than I like but the stove never goes into fault mode ( the stove is clean the exhaust is clean I'm think maybe the motor is slowing down. Any help much appreciated tnx in advance. Ps the stove is a 2007