Parts/Service for W11387992

Parts/Service for W11387992

Brand: Whirlpool logo Whirlpool

Category: Microwave Ovens

Document Type: Parts/Service

Language: EN

Uploaded: Nov. 21, 2025, 7:52 p.m.

Manual Publish Date: 2019-01-01

This manual provides service information for the Whirlpool Low Profile Microwave Hood Combination. It covers safety precautions, product specifications, diagnostic procedures, component access, removal, and replacement. Key sections include general information, diagnostics (including touch panel and error codes), component testing (such as fan motor, thermistors, and thermostats), and detailed component locations. The manual also outlines procedures for accessing and replacing parts like the control panel, door, outer wrapper, hood motor, and interlock switches. Safety is emphasized throughout, with specific warnings regarding electrical shock hazards and precautions to avoid microwave energy exposure. It includes detailed tables for ACU pin voltage matrix and water temperature for line voltage and wattage rating to aid in troubleshooting and output testing.

Troubleshooting and error codes

Display Likely Failure Condition Recommended Repair Procedure
"Enter clock" or Flashing colon ":" Power failure After a power failure, "Enter clock"/Colon ":" will be flashing. Press any key/CANCEL to end this indication. The colon (:) will appear when in Standby mode.
F2E1 Touch panel failure 1. Unplug microwave oven or disconnect power.
2. Replace touch panel.
3. Replace all parts and panels before operating.
4. Plug in microwave oven or reconnect power.
5. If problem persists, refer to "ACU Pin Voltage Matrix."
F1E4 MW Relay 1. Unplug microwave oven or disconnect power.
2. Check wiring to Relay 4903.
3. Check to see if relay (4903 on ACU) contact has welded closed.
4. Replace all parts and panels before operating.
5. Plug in microwave oven or reconnect power.
6. If problem persists, refer to "ACU Pin Voltage Matrix" to check P2-2 (Door), P1-3 (N), and P1-1(L).
F4E4 Humidity sensor error 1. Enter the Diagnostics mode (press CANCEL - CANCEL - START), and then press COOK to display the humidity sensor reading. If display does not show the value between "2000 and 9000" continue to Step 2.
2. Unplug microwave oven or disconnect power.
3. Connect a new humidity sensor ACU to cable.
4. Replace all parts and panels before operating.
5. Plug in microwave oven or reconnect power.
6. Enter the Diagnostics mode (press CANCEL - CANCEL - START), then press COOK to see if failure code reappears.
NOTE: There may be a delay (approximately 1 minute, 20 seconds) before the F4E4 failure code is displayed.
7. If the F4E4 failure code reappears, unplug microwave oven or disconnect power.
8. Replace ACU.
9. Replace all parts and panels before operating.
10. Plug in microwave oven or reconnect power.
F8E5 Exhaust air temperature detection failure 1. Enter the Diagnostics mode (press CANCEL - CANCEL - START), and then press SETUP or CLOCK to display the exhaust air temperature sensor reading. Verify the sensor temperature reading is at room temperature (typically 50°F to 90°F [10°C to 32°C]) and verify failure code. If failure code matches complaint, continue to Step 2.
2. Unplug microwave oven or disconnect power.
3. Disconnect sensor from ACU.
4. Measure sensor resistance between connector pins and confirm reading is between 9.5 ΚΩ and 10.5 ΚΩ at room temperature. If measurement is not correct or if a short or open circuit is found, replace sensor.
5. Replace all parts and panels before operating.
6. Plug in microwave oven or reconnect power.
7. Enter the Diagnostics mode (press CANCEL - CANCEL - START), and then press SETUP or CLOCK to display the cavity temperature sensor reading. Verify the sensor temperature reading. If it is still not correct, replace ACU.
8. If failure does not reappear, stop.
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