Error code reference

Jenn-Air Oven Error Code 4d12

Door switch position failure - door switch not closed when door is locked (lower oven).

SourceJennAir Combination Wall Ovens & Microwaves - Service Manualp. 19, 23-24

Diagnostic procedure

The full 4d12 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Check door switch and wiring. Disables Clean and lockout functions.

SourceJennAir Combination Wall Ovens & Microwaves - Service Manualp. 19, 23-24

Unlock with pass

More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

6 manuals in the MyPros+ library document this code for Jenn-Air oven.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full 4d12 procedure

Where this code is documented

Models covered by the manuals that document this code

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