Your dryer is a gas model and does not have a heating element like a electric dryer.

Your dryer has a ignitor and gas burner.

If the dryer runs but does not heat it maybe a bad ignitor or a bad thermal fuse.

Here is the service manual for your model dryer. It has a troubleshooting guide that will show you how to test them.

http://appliancejunk.com...ownloads;sa=view;down=27