I’ve been defrosting the back of my frig over the past 2 years every 4-8 weeks. I finally decided to look into replacing a few parts. After watching the videos I realized it was something I could easily do. I did end up having to purchase a tool, but the cost was only $12 which is far less than it was the service guy would have charged me. Over all to remove the old parts and replace the new parts it only took me 10 mins.