Good Afternoon
I got a call at work, from the wife that the refrigerator was not cooling and all of the food was warm and melting. I went home to take a look, vacuumed out the condenser coil in the back and underneath, found no water in the tray to my surprise. I pulled the cover off the evaporator and found it iced solid, I set it up to drain so it would not ruin my floor and headed back to work. It looks like what I have read I have a defrosting problem. Would it be a safe bet to order a defrosting element and thermostat? Or should I go back home and take a look further and borrow an ohmmeter and figure it out exactly. Is there a common failure to these models that I could order safely?

Let me know, much appreciated
Thanks
Scot