Many times a freezer and/or refrigeratordo not work right because of a dirty condenser coil...there are also many otherthings that can go wrong.
If you are hearing a clicking or buzzing thencheck out the last two tips.
If your refrigerator is running but warm, then...
Check out these tips that I wrote about that... it is a great place to starttrouble shooting your unit...and something that you can do rather then callinga repair person to do a simple thing for you...
Refrigerator Condenser Coil Cleaning Refrigerator Repair
Refrigerator Troubleshooting Refrigerator Compressor
Refrigerator Compressor Start Capacitor and Start Relay
Refrigerator or Freezer not Cooling or Getting Cold