This is a simple repair. Just follow these steps:
1. UNPLUG dryer. Dangerous voltage is still present even with the dryer turned off.
2. Remove the dryer vent exhaust hose and remove the back of the dryer.
3. The heating circuits are located on the right hand side (as viewed from the rear). The heating element is located inside the heater box. Simply remove the mounting screws on the heater box and remove the two wires on the heating element terminals. NOTE: You can leave the two remaining components (Thermal Cut-Out and Hi limit Thermostat) connected on some models. If you need to remove them in order to remove the heating element make sure you label the wires.
4. Locate the mounting screw(s) on the outside of the heater box that hold the heating element in place.
5. With the mounting screw(s) removed the heating element will slide out of the heater box.
6. Insert new heating element, making sure you avoid touching the coil and align the screw holes so you can reinsert the mounting screws.
7. Re-install the heater box and any remaining components.
Now...are you sure you have a bad heating element? Just because a dryer does not heat, does not necessarily mean the heating element is bad. The following link explains:
The most common fail item that causes a dryer heating circuit failure is a blown TCO caused by poor dryer ventilation. Just something you may consider.
If you have any questions, please let me know. I hope you find this information helpful.