A model number may help others help you.

Also depending on the cycle type many units shut the heat off before shutting the unit off. This help prevent wrinkling of the clothes.

Do the clothes not dry in both timed dry and auto modes?
Have you checked/cleaned your vent system?

Unplug the unit and disconnect it from the vent system.
Now try a run.
If it now dries OK odds are the vent system needs checking/cleaning.
Be sure to check that the louvers on the outside of the house open correctly.

If you do not want any lint in the house.
Take a pair of pantyhose.
Put one leg into the other and then attach this to the dryer's vent.
Leave enough room so the pantyhose can balloon out like a windsock.

Both the above will let you check the temperature and the air flow.

Note: The above is not recommended for gas dryers due to carbon monoxide concerns.