We just plugged in our oven and it has E005 Communication error popping on the screen. Any ideas?

This is what was posted on another site, hopefully it will help you.
E005 indicates a communication problem.
Basically, the electronic boards were unable to talk to each other.
If powering off and back on cleared this then it's likely it was a software glitch and "rebooting" sorted the problem out.
If it does happen again and won't clear, you will need to check the wiring between the boards inside the appliance and possibly replace the boards.
You can't prevent spikes in the mains that may cause spurious errors I'm afraid. (which is what I think may have happened in this case).
Hope this is of some help
Let me know how it goes or if you need more help
Thanks

This was posted years ago on another site, hopefully it will help you too.
E005 indicates a communication problem.
Basically, the electronic boards were unable to talk to each other.
If powering off and back on cleared this then it's likely it was a software glitch and "rebooting" sorted the problem out.
If it does happen again and won't clear, you will need to check the wiring between the boards inside the appliance and possibly replace the boards.
You can't prevent spikes in the mains that may cause spurious errors I'm afraid. (which is what I think may have happened in this case).
Hope this is of some help
Let me know how it goes or if you need more help
Thanks

this code is an indication that communication has been lost between the oven control board and the clock module , ive had this pop up once since they came out with these !! and what I found it to be is a weak/dirty push on connector on the oven control module , as it disappeared after cleaning them off !! but of course I fist replaced the oven control module ?? thinking it was a fault with that !! it worked a few days and came back again !! so then I looked deeper and found the connectors looked like white powder on them ?? I cleaned that stuff off and it dissapeared

Hi,

This fault is a communication error at the appliance manager, could be a loose wire or a bad display transformer, either way you will need a certified technician to fix this issue, there is no simple plug and go issue to resolve. I personally found the problem to be the transformer not send voltage to the appliance manager. This is solvable but needs someone who understand electronics to correct this issue.

F6 E0 Oven user interface - lost communication E6 Oven appliance manager 1 (upper, single) - lost communication

This is directly from the tech sheet of your oven and directly from the factory web site.

Good Luck

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

We have a Gaggenau BO250/251. It gave error code E005, and after a lot of frustration, we opened the left hand light (NOT the light at the top of the owen) and fiddled a little with the bulb. And voila, the owen worked again.


Stupid design to disable the owen when the light does not work. Bravo, Gaggenau....

Turn the power to the oven off. It usually is not possible to unplug the power chord for the built-in appliances so go to the main switch board and just turn off the oven power for about 5 minutes and then turn on the switch. The error code should disappear. Mine did!
Chander Mehta

Your erc(clock) is bad.

Got this error this morning and it cleared when I turned off the circuit breaker and turned it back on.
Oven is now working

turn off the circuit breaker and turn it on again 30 seconds later... this oven is a total waste of money...never buying another one of these again.