I bought a new Kitchen Aid wall oven/microwave-convection combo (KEMS309BSS). When they isnatlled it it made a loud humming noise and then died. They brought a second oven and istalled it. It also hummed (not as loud as the first one), and then stopped working alltogether. I brought in a master electrician to check electricity and he said the electricity is perfect. What could be the problem?

SOURCE: we installed kitchen aid microwave convection oven

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

SOURCE: Kitchen Aid Wall Oven KEMS308SSS - Display Panel

Hi,

You are having a communication error between the appliance. Here is the actual tech manual instructions for that code:

PROCEDURE: Before proceeding, press OFF, OFF, START to enter Diagnostic

mode and verify the error codes. Ensure AM software, UI software and EEPROM

CHECKSUM versions appear on the lower text line. If AM software and EEPROM

versions do not appear, UI and AM may not be communicating. Verify this for the

lower oven UI and for the microwave (upper oven) UI. The lower oven UI will show

the AM software version for the lower oven appliance manager, and the microwave

UI will show the AM software and EEPROM versions for the microwave appliance

manager.

If the lower oven UI is not displaying the AM software version, go to UI IS NOT

DISPLAYING AM SOFTWARE VERSION.

If the upper oven UI is not displaying the AM software and EEPROM versions,

go to UPPER OVEN UI IS NOT DISPLAYING THE AM SOFTWARE AND

EEPROM VERSIONS.

If lower oven UI and microwave UI are both displaying an error, go to LOWER

OVEN UI AND MICROWAVE UI ARE BOTH DISPLAYING AN ERROR.

UI IS NOT DISPLAYING AM SOFTWARE VERSION:

A. Unplug oven or disconnect power.

B. Open the back panels and make sure the P6 and P2 connectors are fully

inserted on the appliance manager and on the lower oven user interface board.

- If they are not plugged in, plug in connectors and go to step F.

- If they are plugged in, go to step C.

C. Visually inspect all wires between P6 on the appliance manager and P2 on the

lower user interface.

- Make sure wires are not cut or pinched.

- If the wires appear to be intact, perform a continuity check between

P6-1 of the appliance manager and P2-1 of the user interface board.

Complete for P6-2(AM) to P2-2(UI), P6-4(AM) to P2-4(UI) and P6-5(AM) to

P2-5(UI). All the measurements made should be less than 5 ?. If any of

these measurements exceeds 5 ?, go to step E.

D. Replace the appliance manager. Ensure all connectors are properly inserted.

E. Replace the wiring harness (signal). Ensure all connectors are properly inserted.

F. Replace all parts and panels before operating.

G. Plug in oven or reconnect power.

H. Observe for longer than 1 minute to determine if error has been repaired.

I. If error does not appear, initiate a bake cycle. Let the cycle run for at least

1 minute.

- If no error occurs, cancel the cycle, the problem has been repaired.

- If error occurs again, restart the troubleshooting procedure at step A.

At step D, replace the lower oven user interface board if appliance

manager has already been replaced.

- If both are replaced the problem has been repaired.

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

SOURCE: I need a user manual for a kitchen aid convection/

Hello & Welcome to FixYa

Please click on this link to download the manual for your Kitchen Aid. Please get back to me if you have any other questions.

Kevin

SOURCE: kitchen aid kemc308kss0 microwave/oven combo

To change a control board, do I need to take the door out?

SOURCE: I want a manual for a kitchen aid convection

Hello Inna,
Here is the link to that users manual https://www.whirlpool.com/digitalassets/MLPDF/User%20Instructions%20-%20W10170438A.pdfyou can click on it to download it
GENE