newb on these boilers. lately the FUEL has been popping up. the other day as it was warming up, i had it up to 165 and then the fan shuts off and FUEL shows up. then i can't get it off there. the only way i can get it to reset is by going through the settings until i get to "PROD" and hitting the ok button again and going back to factory settings. Everything seems to be working fine, but i'm just getting the fuel deal even though i'm up to temp and the chamber is full of wood. any thoughts? and be gentle cause i don't know much about this stuff...yet. Thanks!