Did you pull the covers off around the burner & check the cooling tubing ?.
That burner cover can hide a problem should the cooling tubing have a hole & allowed the coolant to leak out.
Sounds like the burp deal might be what you need to do.
You dont have to buy a new complete fridge, you can get a replacement cooling coil on the back & have it installed or do it yourself.
Not a hard job replacing that coil, more trouble getting the fridge out so you can do the work than the coil replacement.
Check on one of the Amish replacement cooling coils, they seem to be the best or you can check E bay & get a rebuilt cooling coil.
Neil
