I have a Kenmore Elite Heavy Duty Clothes Dryer 3 years old that just stopped heating. Can and how do I repair?

I have a Kenmore Elite Heavy Duty Clothes Dryer 3 years old that just stopped heating. Can and how do I repair?
If it is an electric dryer, then your heating element went out. Easy to buy, easy to replace as a rule, if you are good around high voltage/amp wiring. If uncertain, pay a pro to replace it. If it's a gas dryer, you need to contact your gas supply company for advice