My Kenmore electric range, model # 665.92002102 is displaying the error code E0 F2. From everything I've read online I know it is either the keypad or the ERC. How do I know if they are one unit or two seperate peices? I'm thinking it's one unit and I've ordered part # AP3174468, but then saw another post that said the ribbon connectors didn't match up. Is this a difficult fix? Should I call in a repairman? Thanks in advance for your help and suggestions.