A friend of my wife gave us a Kenmore upright freezer (model 253.26052102). She said it doesn't work, but didn't give details. On the bottom grill in between two indicator lights (amber and red) is a on/off toggle switch that is in the off position. When I plug in the freezer, both lights come on and I hear a motor start/run. But, when I turn on the toggle switch, a loud buzzing alarm sounds and doesn't stop until turned off. 1. Does the toggle need to be "on" for the freezer to work properly even though the motor is running? 2. What is the alarm indicating? 3. What can be done to troubleshoot the freezer?