Thermador oven - F12 error code

After a power outage at our house, our Thermador double oven keeps displaying an error code of F12 and 3 beeps when we try and turn either oven on. We tried powering off the oven at the electrical panel with no luck. Over 3 years ago, we had a similar problem with an F11 error code which we replaced the Control, Mop Power/Relay board and harness which fixed the problem. Has anyone encountered this and do you feel we need to replace this same relay board again?

Deb