The DE light was flashing on our older model GE refrigerator (TFX27PFX). We de-iced the coils inside the freezer and the refrigerator worked fine while we waited on the new replacement part (Heater Harness Defrost Assembly) to arrive. The new part is now installed and the refrigerator seems to be working fine. But, after 12 hours, the DE light is still flashing even after pressing the system check button. Now, we are unsure if the part fixed the problem, or the frige is working again simply because we de-iced the coils again. Is there a reason why the DE light would still be flashing? The refrigerator is built-in and almost impossible to unplug. Does it have to be unplugged for the DE light to reset?