Dryer Doesn't Dry Clothes

It takes at least three cycles to dry one load of clothes in my Amana LEA80AW. What parts should I look into replacing?

Most likely the problem is a clogged exhaust line or/and an air ducts inside the dryer.

Here are the break down diagrams for the Amana dryer Model LEA80AW

Gene.

What’s the best way to get to the air duct?

You have to remove the front panel (#14 on the front & top parts break down diagram).

Gene.

I checked air duct and exhaust line, no clog. What should I look for next? Is the exhaust air supposed to hot or cold? My dryer is blowing out cold air, but the element in the back of the dryer (viewing from inside the drum through the door). help!