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Error code reference

Kenmore Range Error Code F4 E3

Over temperature during clean (temperature runaway during self-clean).

Kenmore codesKenmore range codes

Over temperature during clean (temperature runaway during self-clean).

First step from the service manual

Enter Diagnostic mode and press BAKE key to cycle the bake relay on and off to verify relay operation.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F4 E3 means on a Kenmore range

The F4 E3 error code on a Kenmore range indicates an over-temperature condition detected during the self-clean cycle, specifically a temperature runaway event. During self-clean, the oven is designed to reach and hold extreme temperatures, typically in the range of 800 to 900 degrees Fahrenheit, to incinerate food residue. When the control board detects that the oven temperature has exceeded safe operating limits or is rising uncontrollably without responding to relay commands, it triggers this fault and shuts down the cycle as a protective measure.

The bake relay on the control board is the primary component responsible for cycling power to the bake element on and off to regulate oven temperature. If this relay welds shut or fails in the closed position, it allows continuous, uninterrupted current flow to the bake element, causing the temperature to climb beyond the intended setpoint. A faulty oven temperature sensor (RTD probe) can also contribute, since incorrect resistance readings cause the control board to misinterpret actual cavity temperature, leading to inaccurate heat regulation during the high-demand clean cycle.

The recommended first diagnostic step is to enter diagnostic mode and press the BAKE key to manually cycle the bake relay on and off. This test confirms whether the relay is responding to control board commands or has failed. If the relay does not respond or the element remains energized regardless of commands, the control board is the likely replacement candidate. A failed temperature sensor should also be tested using a multimeter to verify its resistance output falls within the specification for the current ambient temperature.

Source: manufacturer service documentation.

Common causes of F4 E3

  1. 01

    Welded or stuck bake relay on the control board

    Part replacement

    If the bake relay welds closed, it allows constant power to flow to the bake element with no way to cycle it off, causing uncontrolled temperature rise. Diagnostic mode can confirm this by testing whether the relay responds to BAKE key commands.

  2. 02

    Faulty oven temperature sensor (RTD probe)

    Part replacement

    A defective temperature sensor sends inaccurate resistance readings to the control board, causing the oven to misjudge actual cavity temperature and overheat. Testing the sensor with a multimeter at room temperature can reveal whether resistance values are out of specification.

  3. 03

    Failed oven control board

    Part replacement

    If the control board itself has failed and cannot properly regulate relay operation, temperature runaway can occur even if the relay and sensor are functioning correctly. This is often confirmed after relay and sensor testing rule out those components.

  4. 04

    Bake element failure causing arcing or shorting

    Part replacement

    A bake element that is internally shorted or arcing can draw continuous maximum power regardless of relay state, contributing to rapid temperature spikes during self-clean. Visual inspection of the element for burn marks, holes, or blistering can help identify this issue.

  5. 05

    Poor door latch or seal allowing inaccurate temperature readings

    Wiring / connection

    If the oven door does not seal properly during self-clean, heat escapes and the control system may compensate by driving temperatures higher, potentially triggering runaway detection. Inspect the door gasket and latch mechanism for damage or misalignment.

See the test procedure for each cause

Frequently asked questions about F4 E3

What does F4 E3 mean on a Kenmore range?
F4 E3 indicates an over-temperature condition during the self-clean cycle, also called a temperature runaway fault. The oven detected that cavity temperature rose beyond safe limits or was not being controlled properly by the bake relay. The appliance shuts down automatically to prevent damage or a fire hazard. The most common causes are a stuck bake relay on the control board or a defective oven temperature sensor.
Can I fix the F4 E3 error myself, or do I need a technician?
A knowledgeable DIYer can perform basic diagnostics, including entering diagnostic mode and pressing the BAKE key to test relay operation, as well as testing the oven temperature sensor with a multimeter. However, replacing a control board or internal wiring components involves working near high-voltage parts, so comfort with appliance repair is important before proceeding. If diagnostics point to a control board replacement, many technicians prefer to handle that repair to avoid damage to the new part during installation.
Is it safe to use my Kenmore range after seeing the F4 E3 code?
You should not attempt another self-clean cycle until the root cause has been identified and corrected. If the bake relay is welded shut, running the oven in any mode could result in continued uncontrolled heating. Surface burners may remain usable if they operate on a separate circuit, but the oven cavity should be considered out of service until the fault is resolved.
Will resetting the range clear the F4 E3 error code?
Disconnecting power to the range may clear the error code from the display temporarily, but it will not fix the underlying problem. If the bake relay is stuck, the temperature sensor is faulty, or the control board is defective, the fault condition still exists and the code will return when the self-clean cycle is attempted again. Proper diagnosis of the components involved is necessary before the repair can be considered complete.
How much does it cost to repair a Kenmore range showing the F4 E3 error?
Repair costs vary depending on which component has failed. A replacement oven temperature sensor typically runs in the range of $20 to $60 for the part. A new control board is the most expensive scenario, often ranging from $150 to $350 or more for the part alone. Adding professional labor can bring total repair costs to anywhere from $100 to $500 depending on your location and the specific model.

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