I could not download the stove technician manual for the USSC 4 button control boards (you can adjust every parameter including the pulsating convection fan). It's a technician only manual and not for general publication but every time I attempted to download it to a post on here, my laptop locked up, so I sent the PDF to Don2222 and he has it if anyone wants or needs it. They aren't the easiest boards to custom set so if yours is a 4 button (the 2 button is obsolete) and it's running factory defaults and doing fine, don't screw with it. Only reason I custom programmed mine was I'm running a corn / pellet mix and the factory default setting weren't ideal for my application. Normally, the boards come from the factory in the pellet fuel parameters but sometimes will come in the corn parameters but will have a tag on the board itself that states for corn only. No tag, it's pellet set. if anyone wants a copy see Don. Like I said, I have it and could make hard copies but attach it to a post, ain't gonna happen and I'm not that computer savvy to make it happen. I'm just an old fart that types with 2 arthritic fingers......lol