Check your batteries - the eyebrow control on the frig uses 12V power, not electric. You would not be able to change the mode unless you have 12v power. I think most read your post wrong and should re-read it again. You should keep it set on auto and it should stay on electric power when you are plugged in. If it's not the battery charge, it could be the eyebrow control itself, or your circuit board. You could try to reset the circuit board by unplugging from the outside compartment both the 110 and 12v connections. Wait and few minutes and plug in 12v, then the 110 and see if you can set it on auto/ac.