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E8

E8 - Lost communications with Microwave Oven Appliance Manager (F6)

KitchenAid · Microwave Combination Oven

What does E8 mean?

This error indicates that the oven's User Interface (UI) is unable to communicate with the Microwave Oven Appliance Manager. This lack of communication prevents proper control and operation of the microwave functions.

Common Causes

  • Loose or faulty communication harness between the Oven User Interface Board and the Microwave Appliance Manager.
  • Faulty Microwave Appliance Manager.
  • Faulty User Interface.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the oven power at the circuit breaker, wait 10 seconds, then turn it back on.

  2. 2

    Ensure that all external connections, especially where the control panel meets the main unit, are secure.

  3. 3

    Enter Diagnostics mode by pressing CANCEL>CANCEL>START, then press the 3 or 6 keypad to scroll to the Faults screen and verify the E8 error code.

  4. 4

    Clear the error codes from the Diagnostics Menu by pressing CLOCK/TOOLS, then START.

  5. 5

    If the error persists, the internal communication harness or control boards may require professional inspection and repair.

  6. 6

    If the UI was recently replaced, follow the 'Cavity Size Select' procedure in the manual.

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

Related Faults

E0E0 - Product not wired correctly (F9)E1E1 - Stuck/shorted key (F2 Keypad)E3E3 - Meat Probe Connector Jack or Meat Probe Shorted
Source: KitchenAid Microwave Combination Oven
Open Manual (Page 48)Search more codes in this manual