Check your freezer temperature. It should be between 0 and 5 degrees F.
The ice maker will not work unless the freezer is cold enough.

See the attachment for the tech sheet.

First you have to determine if the compressor is working.
You can usually hear it but also should be able to feel it vibrating.

Also check that the evaporator/freezer fan and the condenser/compressor fans run.

Does the compressor cycle on/off or is it on all the time except when the unit goes through a defrost cycle?

If on all the time remove the cover in the freezer and check the evaporator coils.