I don't agree with 15min. If you had a pile of pellets, then it's not going to start. Just leave the plate out while you fire it up and watch it.
It could be that when you moved the unit around and the pellet pot moved a bit and pulled away from the heating element.
Make sure your pellet pot is firmly in place and try it again.
BTW. Was this used before? And did you clean out the pots before use again? Ash will build up in the pot area if you don't clean it out.
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