Biltmore Warming Blanket Controller Displaying "E"?

I have called the customer service number 3 times on three different days, in response to their menu choices and have not received any response. My Biltmore warming blanket controller displays "E". I have unplugged it and plugged it back in and checked the connection to the blanket, which is secure, and still the controller shows the error.

I would appreciate any help.