Eecrolux combination wall oven / microwave is in demo mode model# ew30mc65jb

check here.....
https://www.justanswer.com/appliance/b1cqb-kenmore-elite-microwave-wall-oven-combination-set.html

Suggest you contact the manufacturer. There is little information on the web

I looked up the parts break down for this model there are 7 different ones your last 2 digits are missing this unit dos not use torsion springs the MW door should have a brown arm riveted to the door that goes into the frame this activates a switch

Are you sure of the error code number? A list that I found only goes from E1 to E15 and F0 thru F9 & also a Fd code. Double check the code and respond back to me and I will see if I can help you further.

Hi Sharon Knight - Does any part of the range work? I would recommend verifying that a fuse is not blown or a circuit breaker tripped. Test the power outlet with a lamp, hair dryer, etc. Another questions, does "Loc" appear in the display if any button is pushed? The Oven Lockout feature automatically locks the oven door, prevents the warmer drawer and most oven controls from being turned ON. If so, press and hold CLEAR/OFF for 3 seconds. A beep will sound. LOC will clear. The "DOOR LOCKED" will continue to flash until the oven door has completely unlocked. Does the clock display "Sd" or "dddd"? If so, the clock is in sales demo mode. Press and hold the "BAKE TIME" button for 6 seconds to exit sales demo mode. If this does not prove to be successful, contact a professional to have EOC diagnosed and/or to confirm that there isn't a wiring failure.

Could you please double check that model number? I don't see a oven under that number.
Regards,Richard

Hello,
If that model number EOC68000X is correct then in the manuals I have for that Model there is no Demo mode setting.If you can supply the PNC number then I will investigate further.Try relogging your call with this information.

Hope this helps.

1) If there is a reset on the electronic panel try that.
2) Set the temperature to 200 and see if works then.
3) Put a baking tin in the oven with a piece of meat in it.
4) Uninstall the Wall Oven and take the back off and check the wiring for the elements and the convection fan.

http://www.kueppersbusch-hausgeraete.de/index.php/modProduct/view/id/116/gid/1

scroll down to the bottom and download manual ovens are different but the demo mode is the same

Hold in all 3 buttons for up to 30 seconds. When you hear the cooker beep it will have reset.