EF error code on frigidaire

My Frigidaire also got the dreaded E-F error code and stopped cooling. Technician over the phone told me to unplug it for 5 minutes and then plug it back in to see if the control board would reset itself. Did that with no luck. Unplugged the refrigerator last night while I tranferred my food to a spare fridge in the garage. Plugged the fridge back in this morning (9hrs later) and it works fine with no error codes. It looks like the control board has reset itself but how long it takes...I dont know. 10.. maybe 15 minutes? Well more than 5 at least. Guy over the phone told me that you can buy DRY ICE at a local grocery store and put it some in your freezer and a little bit in the frigdge to keep the food cold for a day. I had a spare fridge but I thought that was a good tip for anyone that needs to buy time for a tech to come repair the fridge. I had just bought $300 in groceries the night before so that tip would have come in handy if I did not have the spare fridge. I have no idea what the EF error was for but it's been 5 hours since I plugged my fridge back in and it's running fine so I'll cross my fingers. Got around to cleaning the fridge and plugging in a surge protector too. Hope this post helps someone out there.

I got a replacement controller board from RepairClinic.com and it solved the problem. The board is located under the freezer side of the unit. You have to take out an outside panel and unscrew an upside-down nut with, I believe, a 10mm wrench or socket. After that, the front of the tray will drop and you can slide the tray out. The controller board is inside the tray. There are three sets of connectors. You just need to unplug them and put in the new board and reconnect.
I suspect how my unit failed was due to power spike. Since then, I put a surge protector between the unit and the wall outlet. It's been working fine since Sept.

COULD BE A PROBLEM WITH COMMUNICATION BETWEEN THE USER INTERFACE AND THE MAIN CONTROL