A:Answer I have not had this problem with the Samsung dryer, but had it with my previous dryer and it was almost always due to my dryer vent being clogged. Usually a bird had climbed into the outside vent and built a nest and then there was no air flow. We had to take a leaf blower and blow it out, blowing from inside the laundry room towards outside to clear it out and then the dryer heated fine.