I have a newly purchased Laredo 1000. Have had several instances when I got an err code and igniter symbol flashing. Seems like it might be somehow related to temperature increases. I just smoked a brisket successfully at 220 for over 8 hours but when I raised the temp to 275 to speed up the end time, the unit showed the err code and igniter symbol flashing again. The fire pot was empty and minimal ash in the pot. Was using Kingsford cherry pellets. Smoked a chicken yesterday at 400 degrees and all was ok. All wiring connectors seem to be firmly connected. What could be the problem with the err and shutting down?