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Arcing

Arcing in the microwave oven

KitchenAid · Microwave Oven

What does Arcing mean?

Sparks or arcing are visible inside the microwave oven cavity during operation. This is typically caused by food soil buildup or debris.

Common Causes

  • Soil buildup on cavity walls
  • Soil buildup on the microwave inlet cover
  • Soil buildup on cooking rack supports
  • Soil buildup on the area where the door touches the frame

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off and unplug the microwave oven.

  2. 2

    Clean the microwave oven cavity walls, inlet cover, and cooking rack supports thoroughly.

  3. 3

    Pay special attention to the area where the door touches the frame, cleaning any soil buildup.

  4. 4

    Plug in the microwave and test for arcing.

Browse all codes in this manual (10)
Verified technical data. Last updated: April 2026

Related Faults

Door messageDoor message appears in display — Door closed too long without startingError indicatorLetter followed by a number in display — General errorFan running (cooktop use)Cooling fan running during cooktop usage — Normal operation
Source: KitchenAid Microwave Oven
Open Manual (Page 6)Search more codes in this manual