Age of this model fridge?

All I could find were old reviews of it on the search engine which seem to indicate it is from around 2000 (around 13 years old).

Hi Heftyc

We can't tell you anything with just the model number. Here, the SERIAL number is more likely to have the information that relates to the age of the appliance.

I would suggest that you get the serial number and call sears:

http://www.searspartsdirect.com/partsdirect/part-model/FRS20ZRG

Scroll down the page to the CHAT icon... ;)

Mark

This will give you the date: https://dl.dropboxusercontent.com/u/8010163/Appliance_Date_Finder.pdf
You can also go here: Appliance411: Service: How old is my appliance? Age, date of manufacture code decryption help for your appliances (http://www.appliance411.com/service/date-code.php)
Good Luck.