Yep . I'm having the same issue with my 680. Rtd has been replaced, fan, wifi controller, hot rod... only thing that hasn't been changed is the augers. Spoke to rec tec today, and gonna give one more try then I'll ask for a replacement auger..I don’t remember what temp it was outside. If I had to guess it was probably 50 something... but I’d call Rec Tec if I was you. I would assume, based on my experience, that taking 35 min to get to 375 is not normal.
Chris