Error code reference

KitchenAid Microwave Error Code Err4

Ambient temperature sensor value out of allowed range (displayed during diagnostic test mode when pressing Defrost key).

SourceKitchenAid KAC-45 Built-In Microwave - Job Aid (KBMS1454R)p. 6-4

KitchenAid codes KitchenAid microwave codes

Diagnostic procedure

The full Err4 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 ambient temperature sensor and wiring.

SourceKitchenAid KAC-45 Built-In Microwave - Job Aid (KBMS1454R)p. 6-4

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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

1 manual in the MyPros+ library documents this code for KitchenAid microwave.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full Err4 procedure

Where this code is documented

Models covered by the manuals that document this code

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