frige warm/freeser warm

two days ago noticed my freezer wasn’t freezing and frige side wasn’t cooling removed food unplugged frige for about 30 minutes plugged back in advanced the defrost timer and it started working woke up this am and fridge was not running and so i repeated the same steps as before frige is working as of now and has been for some hours so does any one have any idea I was thinking of replacing the defrost timer and having freon put in it

Sounds like the problem is a bad defrost timer.

What is the complete model number of the refrigerator?

Gene.