My Refrigerator stopped working 4 months ago & started working.

The reason I left it on was to get water for my coffee. About 4 months ago I heard aloud rumblings from below & then knocking in the middle & slowly it stopped cooling ( huge water fountain ) Well no more ice chest…knock on wood. I asked for a break in life & it's been fine & working well.

Ge low profile about 8 years old curious why it just started working.