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Error code reference

Whirlpool Cooktop Error Code F6-E3

Over temperature in warming drawer (runaway temp).

Whirlpool codesWhirlpool cooktop codes

Over temperature in warming drawer (runaway temp).

First step from the service manual

Press CANCEL>CANCEL>START to enter Diagnostic Mode, verify codes. While in diagnostics mode, press BAKE to cycle the bake element and check relay operation.

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

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What F6-E3 means on a Whirlpool cooktop

The F6-E3 error code on a Whirlpool cooktop indicates an over-temperature condition in the warming drawer, specifically a runaway temperature event. This means the control board has detected that the warming drawer's temperature has exceeded its safe operating threshold and is not responding to normal regulation. The condition is described as a runaway temp, which means the system is unable to bring the temperature back within the acceptable range, suggesting a failure in the feedback or control loop that governs warming drawer heat output.

The warming drawer relies on a heating element, a temperature sensor (typically a thermistor or thermocouple), and relay-controlled circuitry on the control board to maintain a consistent low-level heat. When any of these components fail, the drawer can receive unregulated power and climb to unsafe temperatures. A faulty relay that is stuck in the closed position will continuously supply power to the heating element regardless of what the control board commands. Similarly, a failed temperature sensor that reads artificially low temperatures will cause the board to keep calling for heat even when the drawer is already dangerously hot.

Diagnostic access is achieved by pressing CANCEL, CANCEL, then START to enter the appliance's built-in diagnostic mode, which allows you to retrieve and verify stored fault codes. Within diagnostics, pressing BAKE cycles the bake element and tests relay operation, which can help identify whether a relay on the control board is stuck closed or otherwise malfunctioning. This test is a critical step in distinguishing between a failed relay on the board and a defective temperature sensor feeding incorrect data to the control system.

Source: manufacturer service documentation.

Common causes of F6-E3

  1. 01

    Relay stuck closed on control board

    Part replacement

    A relay on the main control board that is stuck in the closed position will continuously deliver power to the warming drawer heating element, causing uncontrolled temperature rise. This can be identified during diagnostic mode by observing whether the relay cycles properly when commanded.

  2. 02

    Faulty warming drawer temperature sensor

    Part replacement

    If the thermistor or temperature sensor in the warming drawer has failed and is reading lower than actual temperatures, the control board will keep energizing the heating element to reach a target that has already been surpassed. Testing the sensor's resistance output against expected values will confirm this failure.

  3. 03

    Defective warming drawer heating element

    Part replacement

    A heating element with an internal short can draw more current than intended, generating heat beyond what the control system is designed to regulate. Visual inspection for burn marks and a continuity or resistance check can help identify this condition.

  4. 04

    Failed or corrupted control board

    Part replacement

    If the control board itself has sustained damage or a firmware failure, it may send incorrect signals to the warming drawer circuit, failing to cut power when the temperature sensor correctly reports an over-limit condition. This is typically suspected after the sensor and relay have been confirmed functional.

  5. 05

    Wiring or connection fault in warming drawer circuit

    Wiring / connection

    Damaged wiring, a pinched harness, or a loose connector between the control board, sensor, and heating element can cause erratic signals that prevent proper temperature regulation. A visual inspection of the wiring harness and connector terminals is the first step to rule this out.

See the test procedure for each cause

Frequently asked questions about F6-E3

What does F6-E3 mean on a Whirlpool cooktop?
F6-E3 indicates an over-temperature condition in the warming drawer, sometimes called a runaway temperature fault. The control system detected that the warming drawer exceeded its safe temperature limit and could not regulate it back down. This is a protective fault designed to prevent overheating. The appliance should not be used until the cause is diagnosed and corrected.
Can I fix the F6-E3 error myself?
Some of the diagnostic steps, such as entering diagnostic mode by pressing CANCEL, CANCEL, then START and checking relay operation, can be performed by a knowledgeable DIYer. However, repairs involving the control board, heating element, or temperature sensor require comfort working with electrical components and disassembling the appliance. If you are not experienced with appliance electrical repair, a qualified technician is recommended.
Is it safe to keep using my cooktop with an F6-E3 error?
You should stop using the warming drawer immediately when this code is active. A runaway temperature condition means the drawer is not being properly controlled and could pose a burn or fire hazard. The cooktop surface burners may still function, but the warming drawer should remain off until the fault is fully resolved.
Will resetting the cooktop clear the F6-E3 error?
A reset may temporarily clear the code, but if the underlying component failure is still present, the fault will return once the warming drawer is used again. Simply resetting the appliance does not address the failed relay, sensor, or wiring issue causing the runaway temperature condition. A proper diagnosis is necessary to prevent the code from recurring.
How much does it cost to repair an F6-E3 error on a Whirlpool cooktop?
Repair costs depend on which component has failed. A temperature sensor replacement is generally the least expensive fix, typically ranging from around $20 to $80 for the part. A control board replacement is on the higher end of the cost spectrum, with parts often ranging from $100 to $300 or more depending on the model. Adding professional labor charges will increase the total, commonly bringing the repair into the $150 to $450 range depending on the specific diagnosis.

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