Problem with kenmore side by side leaking

2 things could be wrong first is you compressor running if is not running you have to check the overload to see if it tripp if it did it will sound like a babys rattle just repl and compressor should kick back on if is running then is you evaporator motor running if is not then check for volatge at the wires if you get 118 then repl your motor. is the unit defrosting is there a lot of ice on the back cover it might not be so 3 thing might be failing 1 timer 2 defrost thermostat 3 heater coil call a tech to have those check out thanks