dryer was not hot

the only thing i do around the house is changing the light bulb, so when our dryer was not working and was about 5 years old, i was told it cost too much to repair and i am better of to get a new one so watched few clips on you tube and ordered the parts from partselect which came with instruction, i could not believe it spend about $100.00 and my dryer is working better than before. bottom line if i can do this anyone can.