I am having same issues. Freezer is fine. I called repair guy who astutely immediately removed the white interior back panel to expose the cooling element and only about 5% had frost on it. That frosty area was apparently the only area functioning because the frost itself was an indicator that it was the only area which still contained any coolant. Parts are under warranty (I purchased in 2000) but the labor is not - which I was warned would be somewhat extensive (cutting out old element - brazing in new element - recharging system, etc...) and therefore expensive.
Rob
October 2008