An appliance repairman came to diagnose the issue causing the burning smell and the reason the 17- year old Frigidaire freezer was not cooling. He plugged the freezer back in and it immediately flamed up revealing the failed power overload controller. He tested the controller and the attached capacitor and found they had both failed. He quoted $556 to replace the failed parts to resolve the issue. We initially decided the replace the whole freezer given its age, but due to the China virus, there are currently no new freezers available anywhere in the area, and we were told it would be months before we could get a new one. I searched the internet and found replacement parts. The new parts are different from the original 17-year old as they have been upgraded. I called the parts seller to see if these were parts an inexperienced person could install, and the person recommended checking YouTube for instructional videos to see if I was comfortable trying it. I found the video on the Appliance Parts Pros website, and it appeared to be a very simple procedure, especially since I was repairing a freezer with much more room to work than the refrigerator repaired in the video. The video also helped me understand there was little danger that I would cause bigger issues that might result in a house fire or other serious issue. I checked Appliance Parts Pros and found the parts were considerably less expensive, so I ordered them, and got them within a few days after a delay by FedEx. It took me about half an hour to replace the parts. It would have taken half that if I had a heat gun when I started the repair. The freezer is now working fine.