Sublime Master KurtiusInterruptus reveals this special repair kata:

This one is pretty simple...betcha the damper door is broken off it hinge.

to access,remove the light lens and frame from the top of the fridge compartment...carefully disassemble the Styrofoam housing at the top left corner...may need to cut the silicon with a box knife to assist in this.

feast yer squintys on the black damper door inside...is it laying askew, broken off the hinge?

well there you are!

Source: GE Monogram Fridge - is freezing. ZISS420MRESS