Samsung dryer NO heat

Hello
Do you have any stored error codes ? Test mode & error diagnostics start on page #29 in the technician link below. Here are some no heat possibilities or not heating properly.

• Check the home’s circuit breaker and fuses. The drum will turn with 115 volts but the heater is #220 volts. Make sure you have 220 volts to the heater.
  • Select a heat setting other than Air Fluff.
  • On a gas dryer, check that the gas supply is on.
  • Clean the lint filter and exhaust duct.
  • Dryer may have moved into the cool-down phase of the cycle.
  Be sure the exhaust hood outside the home can open and close
  freely.
  • Check exhaust system for lint buildup. Ducting should be inspected
  and cleaned annually.
  • Do not overload. 1 wash load = 1 dryer load.
  • Sort heavy items from lightweight items.
  • Large, bulky items like blankets or comforters may require
  repositioning to ensure even drying.
  • Check that the dryer is draining properly to extract adequate water
  from the load.
  • Load may be too small to tumble properly. Add a few towels.