Ok Larry, the problem here and the meaning of the error code is the membrane/keypad has shorted.
The first thing to try is grab your wife's hairdryer then set it on low heat, warm the keypad up, once it is warm try massaging the keys, Once you have done this plug the unit back in, If the error comes back the membrane/keypad will need to be replaced.
I would like to earn your highest rating Larry, are you totally satisfied with my answer? If not please reply to me with your concerns or additional questions. If I have answered your questions to your satisfaction, please don't forget to rate me before you leave.
It was my pleasure helping you today. Feel free to get back to me here at any time if you have additional questions at no further charge. Sometimes I will have to give bad news, Please try to find it in yourself to rate me for the service not the bad news.
Please also remember if you have future questions regarding a faulty appliance, You can request me personally to assist you with the problem :)