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Error code reference

Kenmore Range Error Code F500

Loss of LIN Buss communication between EOC and ESEC.

Kenmore codesKenmore range codes
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What the F500 error code actually means

Your Kenmore range is displaying F500 because two of its internal computer boards have stopped talking to each other, which prevents the oven and surface controls from working together properly. This is usually caused by a loose or damaged wire connecting those two boards, though occasionally one of the boards itself has failed. A technician will need to inspect the wiring and possibly replace one or both control boards to resolve the issue.

Diagnostic procedure

The full F500 procedure

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1
First diagnostic step
Verify communication wire between P4 on EOC and P7 on UIB. If the problem returns: 1. Replace EOC. 2. Replace UIB.
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Most common causes of F500

Ranked by how often they cause this code
  1. 1Loose or disconnected communication wire
  2. 2Damaged or shorted wiring harness
  3. 3Corroded or oxidized connector terminals
  4. 4Failed EOC (Electronic Oven Control)
  5. 5Failed UIB (User Interface Board)

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Questions people ask about F500

What does F500 mean on a Kenmore range?
F500 on a Kenmore range signals a loss of LIN bus communication between the Electronic Oven Control (EOC) and the Electronic Surface Element Control (ESEC). The LIN bus is a serial data link that allows the two control boards to coordinate oven and surface element operation. When this communication link breaks down, the range triggers F500 and may disable cooking functions until the fault is corrected.
Is it safe to use my Kenmore range while it shows F500?
It is not recommended to continue using the range while F500 is active. The error means one or more control boards cannot communicate properly, which may cause cooking functions to behave unpredictably or not respond to commands. Discontinue use until the fault has been diagnosed and repaired to avoid potential safety hazards.
How much does it cost to repair a Kenmore range F500 error?
If the fix is simply reseating or repairing a wire, costs are minimal and may only involve a service call fee, typically in the range of $75 to $150. Replacing the EOC board generally costs between $150 and $350 including parts and labor, while replacing the UIB adds a similar range depending on part availability and local labor rates. Getting a diagnosis before committing to parts replacement is the best way to avoid unnecessary expense.
Will resetting the range clear the F500 error?
Resetting the range by cutting power at the breaker for a few minutes may temporarily clear the F500 code, but it will return if the underlying communication problem is not fixed. A reset does not repair a loose wire, corroded connector, or failed control board. Use the reset only as a temporary measure while preparing for a proper diagnosis.
How do I fix the F500 error on a Kenmore range?
Start by inspecting the communication wire between connector P4 on the EOC and connector P7 on the UIB, checking for loose connections, damaged insulation, or corroded terminals. Reseat both connectors firmly and look for any visible wire damage along the harness. If the wiring is intact and the error returns, the repair sequence calls for replacing the EOC first, followed by the UIB if the code persists.

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