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Error code reference

Electrolux Range Error Code F027

The communication between the oven user interface and the oven relay board cannot be initiated.

Electrolux codesElectrolux range codes

The communication between the oven user interface and the oven relay board cannot be initiated.

First step from the service manual

Check if oven user interface is unresponsive. If no, check AC voltage between pin 1 and pin 3 of J21 on oven relay board for 110-120V AC.

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What F027 means on a Electrolux range

The F027 error code on an Electrolux range indicates a failure to establish communication between the oven user interface (the control panel assembly) and the oven relay board (also called the control board or power board). These two components form the core of the oven's control system: the user interface handles input and display functions, while the relay board manages power delivery to heating elements and other components. When the link between them cannot be initiated, the oven cannot operate safely or reliably, and the F027 code is triggered.

The first diagnostic step is to check whether the oven user interface itself is responsive. If the display is completely dark or unresponsive to input, the issue may be with the user interface board or its power supply rather than the communication link itself. If the user interface appears functional, the next step is to measure AC voltage between pin 1 and pin 3 of connector J21 on the oven relay board. This measurement should read between 110 and 120 volts AC. A missing or out-of-range voltage at this connector points to a problem with power delivery to the relay board, a wiring fault in the harness connecting the two boards, or a failure of the relay board itself.

Common root causes include damaged or disconnected wiring harnesses between the two boards, a failed oven relay board, a failed user interface board, or loose connector seating at J21. Power surges can corrupt communication circuits on either board. Because this fault involves control electronics, accurate voltage testing with a multimeter is essential before replacing components.

Source: manufacturer service documentation.

Common causes of F027

  1. 01

    Loose or disconnected wiring harness

    Wiring / connection

    The wire harness connecting the user interface to the relay board may have worked loose from connector J21 or another junction point. Inspect all connectors between the two boards and reseat any that are not fully locked in place.

  2. 02

    No AC voltage at J21 on the relay board

    Part replacement

    If the voltage measured between pin 1 and pin 3 of J21 is not in the 110-120V AC range, the relay board is not receiving proper power. This can indicate a wiring fault, a tripped breaker, or a failed relay board.

  3. 03

    Failed oven relay board

    Part replacement

    The relay board itself may have failed due to a power surge or component failure, preventing it from communicating with the user interface. This is confirmed after ruling out wiring faults and verifying correct voltage supply.

  4. 04

    Failed oven user interface board

    Part replacement

    If the user interface is completely unresponsive and power to the relay board checks out correctly, the user interface board may have failed and cannot initiate the communication link. A non-responsive control panel display is a key indicator.

  5. 05

    Damaged wiring harness

    Part replacement

    Physical damage such as pinched, burned, or broken wires in the harness between the two boards can interrupt communication. Visually inspect the full length of the harness for signs of heat damage, wear, or breaks.

See the test procedure for each cause

Frequently asked questions about F027

What does F027 mean on a Electrolux range?
The F027 code means the oven user interface and the oven relay board cannot establish communication with each other. This prevents the oven from operating because these two boards must work together to control heating and functions. The fault can be caused by wiring issues, a failed relay board, or a failed user interface board. Diagnostic testing of voltage at connector J21 on the relay board is a key step in identifying the exact cause.
Can I fix the F027 error myself?
Some steps, like reseating wire harness connectors between the user interface and the relay board, can be done by a confident DIYer with the oven unplugged. However, testing AC voltage at connector J21 requires a multimeter and comfort working around live electrical components, which carries risk. If a board replacement is needed, the repair becomes more involved. If you are unsure about electrical testing, a qualified appliance technician is the safer choice.
Is it safe to use my Electrolux range when it shows F027?
No, you should not attempt to use the oven when F027 is displayed. Because the communication between the user interface and relay board has failed, the oven cannot reliably control its heating elements. Continuing to use the range in this condition could be unsafe. Disconnect power to the range until the fault has been diagnosed and repaired.
Will resetting the range clear the F027 error?
A reset, done by unplugging the range or shutting off its circuit breaker for a few minutes, may temporarily clear the F027 code if the fault was caused by a one-time communication glitch. However, if the code returns after the reset, there is an underlying hardware problem such as a wiring fault, failed relay board, or failed user interface board that must be addressed. A reset alone will not fix a physical component failure.
How much does it cost to repair an F027 error on an Electrolux range?
Repair costs depend on which component has failed. A service call and wiring harness repair might range from around 100 to 250 dollars. Replacing the oven relay board or the user interface board typically costs between 150 and 450 dollars or more, including parts and labor, depending on the specific model and part availability. Getting a diagnosis before committing to parts replacement helps avoid unnecessary costs.

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