I have the Sportsman 830 SP wood pellet smoker and here’s my issue: for thanksgiving I smoked my turkey and after about 2 hours the heat was declining (thermometer was flashing). I put the grill back on smoke and then hit prime thinking there were no pellets in the burning plate. The grill begin to smoke excessively for about 5 min then heard a loud bang. The grill flap flies open and flames are coming from under the hood. I took the turkey off the grill (wearing heat resistant gloves) and suffocated the fire and it went out. I thought it may have been a grease fire from the turkey grease build up around the pellet plate. I cleaned out the grill a later date and ready to use another date. I just tried using my grill again and same thing, smoker mode worked fine and then went to adjust my heat and then temp started declining again. Went back to smoke mode and then boom, this was a minor explosion in comparison to first one although this time I don’t know what could be the cause since there was no food on the grill while it was hearing up. Please advise