Hello, Kiesha -
There can be several reasons why your microwave oven will not heat up. Read the information here:
Needless to say, unless you are experienced in fixing microwave ovens or you know someone who is, you will need to find an authorized repair business for Hamilton Beach microwave ovens and take your microwave in for an evaluation for repair. There may be an initial charge for evaluating the microwave for the possibility of repair.
If your microwave oven is still under warranty, see the information from Hamilton Beach here: