I know what the cause of the ER-2 (Failure to Start) Code is. It occurs when the cooker doesn't reach 160 degrees cook chamber temperature within 30 minutes. During cold weather cooks this can happen because the Maverick 1250 and 2000 cook chamber is so large. To avoid it the controller C-11 program needs to be changed from 30 minutes (default) to 60 minutes; and the Controller C-10 program (Auger percentage speed adjustment) needs to be changed from 30 to 50. The owners manual prescribes this for cold weather cooks, and also advises to return to the default settings after the weather warms up. I had the cooker set to 60 and 50 all winter, but after a warm spell I changed the C-11 and C-10 settings back to the default settings (30), and because of a sudden drop in temperature (below 30 degrees) i received the ER-2 Code on this particular cook.
As I said, I know what caused this. My question is/was how and when do I restart the cooker after this happens to avoid a burn back. Bar-B-Lew suggested to let the cooker completely cool down (go through its shut down cycle) before restarting, and this makes sense to me. I didn't do that and hit the restart button before the cooker competed the shutdown cycle. When I did this i noticed the cooker's fan stopped, causing the burn back. Normally, during the 15 minute shut down cycle, the auger stops the feed but the fan continues to run burning off all the pellets in the fire pot,
Yesterday I completely cleaned all the ash from the cooker (which I do after every cook) and completely purged the auger tube of pellets. Then I reloaded the hopper with pellets, put a handful of pellets into the burn pot, and hit the start button. Everything worked as it was supposed to work, including the shut down cycle. So my assumption is that if it happens again, I'll have to remove the meat from the cooker and let it complete the shut down cycle. Once it shuts down completely, I can restart the grill, bring the cook chamber up to set temperature and go from there.
I have heard some on this forum advised to "know your cooker," and this has been a learning experience for me. But printed instructions for restarting the cooker after receiving one of the 4 codes that shuts down the cooker would have been helpful and should have been part of the owners operating instructions.