Dryer Repair
There are a number of issues that could arise with your dryer including:

Machine Wont Turn On
Strange Noises/Banging Sounds
Clothes Are Still Wet

Machine Wont Turn On
If your dryer wont turn on the cause could be electrical. Check your power source with a multimeter or a working appliance. Check your breakers.  If your dryer still wont turn on then the problem could be a faulty thermal fuse.  If this is the case then give us a call and we'll confirm the problem and provide the parts required to fix the machine.

Strange Noises Coming From Dryer
If your dryer is making loud or strange noises it could be due to a failed dryer drum seal.  The most common causes for damage to a dryer drum are frequently overloading your machine and objects that don't belong in the dryer ending up in there (such as lighters and coins).  If your dryer drum seal is damaged it will need to be replaced.

Clothes Are Still Wet
If your clothes are coming out of the dryer wet then it could be due to the heating element.  First check your lint screen and your ventilation.  If both appear to be clear then you will likely need the help of a professional to replace the heating element.