How long does the vent run and how many 90 degree elbows are present? Also, what type of venting material is used? If the “slinky” type flexible venting is used, it can be causing back pressure even though the vent run appears clear. It should be rigid 4″ pipe or rigid flex venting.
The lint filter could be clogged with softener, causing poor airflow. Remove the filter and wash it in warm water using a soft brush to remove the built up softener.
What voltage is the unit plugged into? Take a multimeter and read L1 and L2 at the wall outlet. The voltage for this unit should read 240v. If it reads 208V, a different heating element is required.
The cycle time for electric dryers should be set at 60 minutes. On the time, the cam should have a 3 pin cam for 60 minutes.