From The Star-K: GE Sabbath Mode Ovens

In Important Alerts, Newsletter Items by kosherqu

It has come to the attention of the Star-K, that GE mistakenly removed a critical piece of information from some Star-K certified oven manuals.  In these models of GE, Hotpoint and Crosley models, Sabbath Mode does NOT control the light inside the oven (as it should).  The light WILL turn on if you open the oven even when in Sabbath Mode.

Owners of these ovens should either leave the light on over the duration of Shabbos/Yom Tov or simply remove the light bulb in the oven.