Heater coil in frost-free freeze side fail (second time)

Remove freezer contents, shelves, and interior back-panel. Melt all ice on freezer coolang coil with hair dryer. Be careful not to touch to coling fins on the coils with the hair dryeer since they damage easily. Unplug the old heater coil wire harness at the top of the coils. Gently remove the thermocouple clipped to the top coil. Gently remove the wires leading down to the heater coil at the bottom-back of the freezer. Remove the old heater by removing the two mounting screws. Install new heater by reversing the steps above.
Good luck.
Ps. When the heater coil fails the result is, both the freezer and refridgerator sides get warm and food spoils. A good indicator to watch for is frost building up in the freezer on the interior back-panel. I taped cheap thermometers in both side to help mointor the temperature in case it happens again.