Have a Castle Serenity that will not feed enough pellets. When I am trying to light it, it doesn't drop enough pellets to light, so it faults out. I dropped pellets into burn pot, and it lit, and as long as i dropped pellets in fire pot, it would stay burning. but not on its own. I tried manual and temp modes, and it didn't seem to matter. The pellet stove is a friend of mine and they bought it new and can't get it to burn. They were sent a new interface module and that didn't help. They also sent them a new combustion blower, but the one that is in it works fine, so I have not changed that. I watched the auger and it seems to turn. It is on for about 2.5 seconds and off for 3.5 seconds. I have seen threads where people have trouble with them feeding too much, but I haven't seen any where it wasn't feeding enough. I adjusted the air flow gate all over the place. Even all the way shut. Adjusted combustion blower voltage too. Didn't help. Not sure what to do now. Any help appreciated.