Brand: KitchenAid
Category: Microwave Oven
Document Type: Parts/Service
Language: EN
Parts/Service for KEMS378S & KEMS308S
Uploaded: Nov. 21, 2025, 6:35 p.m.
Manual Publish Date: 2007-01-01
Warranty Information
Limited warranty: 12 months; Extended warranty: 60 months for Electronic Controls, Electrical Elements, Magnetron; 120 months for Stainless Steel Liner/Door (Microwave).
Product Operation Summary
Control Lock:
Disables control panel keys to prevent unintended use. Only TIMER SET/START, TIMER OFF, and OVEN LIGHT keys function when locked. Preset is unlocked.
Doneness Adjustment:
Allows adjustment for more or less done, except for specific functions (Popcorn, EasyConvect™, Custom Reheat, Custom Defrost, Steam). Adjust by touching POWER for MORE, LESS, or NORMAL before starting.
Sabbath Mode:
Keeps the oven on a bake setting until turned off. Timed option available. Only number and start keys function; no tones or display messages. Lower oven is disabled. Oven continues in Sabbath Mode after power failure but will not actively cook.
Convection Broil:
Broil elements cycle on/off to maintain temperature while the fan circulates air. Preset at 450°F (232°C), adjustable. Door opening/closing affects broil elements and fan operation.
Dehydrating:
Uses heat and air circulation to preserve food. Turns off automatically after 12 hours; may need to be restarted for longer dehydrating times.
Troubleshooting and error codes
| FAILURE ERROR | MESSAGE/DESCRIPTION | SUGGESTED CORRECTIVE ACTION PROCEDURE | |
|---|---|---|---|
| (Leftmost 2 Digits) | (Rightmost 2 Digits) | ||
| F3 | E1 | LOWER MAIN OVEN SENSOR SHORTED OR OPEN | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. A. Verify cavity temperature... J. Replace all parts and panels before operating. K. Plug in oven or reconnect power. Wait 60 seconds. L. Enter into Diagnostic mode and read sensor for main oven sensor, warm drawer and meat probe on immediate display. |
| F3 | E3 | MEAT PROBE SHORTED | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. A. Verify cavity temperature... J. Replace all parts and panels before operating. K. Plug in oven or reconnect power. Wait 60 seconds. L. Enter into Diagnostic mode and read sensor for main oven sensor, warm drawer and meat probe on immediate display. |
| F3 | E2 | WARMING DRAWER SENSOR SHORTED OR OPEN | PROCEDURE: Oven is not equipped with this feature. If error occurs press OFF, OFF, START enter into Diagnostics Mode, then replace user interface with correct control associated with this product. |
| F4 | E1 | CAVITY TEMPERATURE SENSOR ERROR | PROCEDURE: There are three sensors for the microwave. They are the Cavity Sensor, Ambient Sensor... P. Replace all parts and panels before operating. Q. Plug in oven or reconnect power. R. Enter into the Diagnostic Mode and press key "6" to scroll to the sensor display. Read the sensor reading for the three sensors, ensuring the cavity, humidity and internal sensors are reading correctly. |
| F4 | E2 | INTERNAL TEMPERATURE SENSOR | PROCEDURE: There are three sensors for the microwave. They are the Cavity Sensor, Ambient Sensor... P. Replace all parts and panels before operating. Q. Plug in oven or reconnect power. R. Enter into the Diagnostic Mode and press key "6" to scroll to the sensor display. Read the sensor reading for the three sensors, ensuring the cavity, humidity and internal sensors are reading correctly. |
| F4 | E4 | HUMIDITY SENSOR | PROCEDURE: There are three sensors for the microwave. They are the Cavity Sensor, Ambient Sensor... P. Replace all parts and panels before operating. Q. Plug in oven or reconnect power. R. Enter into the Diagnostic Mode and press key "6" to scroll to the sensor display. Read the sensor reading for the three sensors, ensuring the cavity, humidity and internal sensors are reading correctly. |
| F5 | E0 | DOOR AND LATCH SWITCH DO NOT AGREE | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. TO VERIFY DOOR SWITCH: A. While in diagnostics, open the oven door... J. Press OFF, OFF, START to reenter Diagnostic mode. Repeat step A. |
| F5 | E1 | DOOR LATCH NOT OPERATING. | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. TO VERIFY DOOR SWITCH: A. While in diagnostics, open the oven door... J. Press OFF, OFF, START to reenter Diagnostic mode. Repeat step A. |
| F6 | E0 | LOST COMMUNICATIONS | PROCEDURE: Before proceeding, press OFF, OFF, START to enter Diagnostic mode. Ensure AM software, UI software and EEPROM CHECKSUM versions appear... 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. |
| F6 | E1 | COOK oven OVER TEMPERATURE | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. A. If oven is off, turn oven on and inspect... T. Plug in oven or reconnect power. U. Verify operation is normal. Press OFF, OFF, START to reenter Diagnostic mode and complete checks. |
| F6 | E2 | CLEAN oven OVER TEMPERATURE | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. A. If oven is off, turn oven on and inspect... T. Plug in oven or reconnect power. U. Verify operation is normal. Press OFF, OFF, START to reenter Diagnostic mode and complete checks. |
| F6 | E3 | MINI OVEN/WARM DRAWER OVER TEMPERATURE | PROCEDURE: Oven is not equipped with this feature. If error occurs, before proceeding press OFF, OFF, START enter into Diagnostics mode, then replace user interface with correct control associated with this product. |
| F6 | E4 | USER INTERFACE/ APPLIANCE MANAGER MISMATCH | PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode. A. Unplug oven or disconnect power. Wait for 10 seconds. B. Plug in oven or reconnect power. C. Enter into Diagnostics mode... Q. Press BAKE and ensure the bake relay energizes... If error returns, go to step R. R. Replace the user interface... U. Press BAKE and ensure the bake relay energizes... |
| F6 | E5 | NO CAVITY SIZE COMMAND | PROCEDURE: Before proceeding, press OFF, OFF, START to enter Diagnostics mode. Control should immediately power up in cavity size select mode... If error returns at least 60 seconds after cavity size has been set, go to step A. A. Unplug oven or disconnect power. Wait 10 seconds. B. Plug in oven or reconnect power... I. Wait for at least 60 seconds to ensure error has been corrected. |