I have 2 Broil King Signet 320s. One at home and one at the cottage. Both have broken top door hinges. 
  The plastic pins broke off at the exact same spot. Must be a very poor design to have 2 identical failures on similar models. The pins are part of the plastic molding that forms the top part of the front doors.
  The only temporary fix I could do was to drill extra holes on the doors and use ty-wraps to hold the doors in place.

Very disappointed. Buying a higher grade brand next time.