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Error code reference

Electrolux Range Error Code E31

Synchronization failure

Electrolux codesElectrolux range codes

Synchronization failure - left side cooking zones generator board.

First step from the service manual

Verify all cable and harness connections to the left side cooking zones generator board.

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

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What E31 means on a Electrolux range

The E31 error code on an Electrolux range indicates a synchronization failure within the left side cooking zones generator board. This board is responsible for generating and regulating the high-frequency signals that power the induction or radiant cooking elements on the left side of the cooktop. When synchronization is lost, the control system can no longer coordinate the timing signals between the main control board and the left side generator board, causing the appliance to shut down those zones and display the fault code.

The most common trigger for this fault is a loose, damaged, or improperly seated cable or harness connection between the main control board and the left side generator board. Vibration during normal operation, heat cycling, or physical stress from installation can cause connectors to back out or corrode over time. Because the synchronization signal is carried through these harness connections, even a marginal connection can disrupt communication and register as a full synchronization failure.

If cable connections check out and are secure, the fault points toward a deeper component issue. The left side generator board itself may have failed internally due to heat stress, a power surge, or a component-level failure on the board. In some cases, the main control board may be failing to send a proper synchronization signal, making it necessary to evaluate both boards systematically before committing to a replacement.

Source: manufacturer service documentation.

Common causes of E31

  1. 01

    Loose or disconnected wiring harness

    Wiring / connection

    A harness connector to the left side generator board that has backed out, is not fully seated, or has become dislodged can interrupt the synchronization signal. Inspect all connectors at both ends of the harness for secure seating and signs of backing out.

  2. 02

    Corroded or damaged connector pins

    Wiring / connection

    Corrosion, heat damage, or bent pins on the harness connectors can degrade the signal quality enough to cause a synchronization failure even when connectors appear physically attached. Visually inspect pins for discoloration, pitting, or deformation.

  3. 03

    Failed left side generator board

    Part replacement

    Internal component failure on the left side cooking zones generator board, often due to heat stress or a power surge, can prevent it from synchronizing with the main control. If wiring checks out, the generator board is the next component to evaluate for replacement.

  4. 04

    Damaged wiring harness

    Part replacement

    A harness that has been pinched, burned by proximity to a heating element, or chafed against a sharp edge may have an intermittent or open circuit. Trace the full length of the harness and look for visible damage to the insulation or conductors.

  5. 05

    Faulty main control board

    Part replacement

    If the main control board is not generating or transmitting the synchronization signal properly, the left side generator board cannot synchronize regardless of its own condition. This is typically diagnosed after the generator board and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E31

What does E31 mean on a Electrolux range?
E31 on an Electrolux range indicates a synchronization failure involving the left side cooking zones generator board. This means the control system has lost the ability to coordinate timing signals with the board that powers the left side cooking zones. The left side burners or elements will be non-functional until the fault is resolved.
Can I fix the E31 error myself?
A knowledgeable DIYer can start by checking all cable and harness connections to the left side generator board, as a loose connector is the most common cause. If connections are secure and undamaged, diagnosing and replacing a generator board or main control board typically requires familiarity with appliance electronics and is best handled by a qualified technician.
Is it safe to keep using my range while E31 is displayed?
The left side cooking zones will generally be disabled when E31 is active, so you may be able to use the right side zones if they are unaffected. However, continuing to operate the appliance with an active generator board fault is not recommended, as an underlying wiring or board issue could worsen and create additional problems.
Will resetting the range clear the E31 error code?
A power reset by unplugging the range or turning off the circuit breaker for a few minutes may temporarily clear the code, but if the underlying cause is a loose connection, a damaged harness, or a failed board, the error will return when the appliance is used again. A reset is useful for confirming whether the fault is persistent, but it does not repair the root cause.
How much does it cost to repair an E31 error on an Electrolux range?
Repair costs vary depending on the root cause. If the issue is a loose harness connection, a service call fee of roughly $75 to $150 may be all that is required. If the left side generator board or main control board needs replacement, parts and labor combined can range from $200 to $500 or more, depending on parts pricing and local labor rates.

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