KitchenAid Microwave Error Code 9d31: Meaning and Fix
Reading the microwave display
On a microwave the code replaces the clock on the display. Unplug the unit for a minute to see if it clears, and note the code before you do. KitchenAid pairs the number with a letter group in the manual, so match the exact characters.
KitchenAid is Whirlpool Corporation's premium appliance line. Its dishwashers, ranges, microwaves and refrigerators share Whirlpool boards but use their own panel layouts and numbering in the manuals. The codes apply to model numbers such as KUDS24SEWH1, KUDS01DJSS0 and KHMS155LSS4; check the label on your unit to confirm yours.
What causes 9d31
- The lock mechanism is not confirming that it latched or released
- Door or lid not closing squarely, or the strike is worn or bent
- Wiring or connector at the lock has corroded or backed out
- Control board is not sending or reading the lock signal correctly
How to fix it
- Cycle the power: unplug the microwave (or switch off its breaker) for one minute, restore power and test it briefly with a cup of water.
- Before opening any panel, switch off the breaker or unplug the appliance; this circuit can carry line voltage.
- Open and shut the door or lid firmly and make sure nothing (clothing, a rack, a hose) is blocking the strike.
- Look at the lock and strike for cracks, bent tabs or burn marks and compare the action with the door open versus closed.
- With power off, reseat the lock connector and check the harness for pinched or green-corroded pins.
- If the lock still will not engage or release, replace the lock assembly and re-test.
- Run a full short cycle or function again and confirm the code stays gone before putting the appliance back into normal use.
Parts you may need
| Part | Part no. | Buy |
|---|---|---|
| Switch | W10727360 | Find part |
Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.
Questions
What does 9d31 mean on a KitchenAid microwave?
It is a fault code from the KitchenAid control. It indicates a problem with a door or lid lock. A power reset is the first thing to try.
Can I keep using the microwave while it shows 9d31?
You can try it after a power reset. If the code returns, the affected function may not run properly, so it is worth fixing soon before it causes a bigger failure.
Do I need a technician to clear 9d31?
Many owners can fix it themselves. Start with the reset and the inspection steps, and only call a technician if the part tests bad and you do not want to replace it.
Other KitchenAid microwave codes
Sources
Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.
Applies to models including KHMS155LSS4, KHMS155LSS1, KHMS155LSS0, KHMS1850SSS0, KHMS145JWH0, KHMS145KSS0, KHMS155LSS3, KHMS2050SSS0.