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Error code reference

Wolf Cooktop Error Code E31

Generator 1 burner (R, RR, RC) 'ON LED' Failure; affected burner is not available.

Wolf codesWolf cooktop codes

Generator 1 burner (R, RR, RC) 'ON LED' Failure; affected burner is not available.

First step from the service manual

Perform LED test #1; if all LEDs work, reset error. If one LED fails, replace Glass Assembly.

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 Wolf cooktop

Error code E31 on a Wolf cooktop indicates a failure in the ON LED associated with Generator 1 burner zones, which includes the Right (R), Right Rear (RR), and Right Center (RC) burner positions. The ON LED is a status indicator built into the glass assembly that illuminates when a burner is actively energized. When this LED circuit fails, the cooktop's control system detects the fault and disables the affected burner entirely as a safety precaution, making it unavailable for use until the issue is resolved.

The glass assembly on these Wolf induction or gas cooktops integrates the LED indicators directly into the unit rather than using separate discrete components. This means a failure in the LED itself, the underlying circuit traces within the glass assembly, or a loose connection between the control board and the glass assembly can all trigger E31. The burner is rendered inoperable because the control system cannot confirm proper status indication, which is treated as an unsafe operating condition.

Diagnosis begins with LED Test 1, which cycles through all LED indicators on the cooktop to verify their functionality. If all LEDs illuminate correctly during this test, the error is likely a transient fault and can be cleared with a reset. If one LED fails to light during the test, the glass assembly is confirmed defective and must be replaced. This test effectively isolates whether the fault is a persistent hardware failure or a recoverable electronic glitch.

Source: manufacturer service documentation.

Common causes of E31

  1. 01

    Failed ON LED in the Glass Assembly

    Part replacement

    The LED indicator within the glass assembly has burned out or developed an internal failure. This is confirmed when the LED does not illuminate during LED Test 1, requiring full glass assembly replacement.

  2. 02

    Transient Control System Fault

    Wiring / connection

    A temporary glitch in the control electronics can trigger E31 without a true hardware failure. If LED Test 1 shows all LEDs functioning correctly, a simple reset will clear the error.

  3. 03

    Loose or Damaged Wiring Connection

    Wiring / connection

    A poor connection between the control board and the glass assembly LED circuit can intermittently interrupt the LED signal, causing the error to appear. Inspecting and reseating connectors at both ends of the wiring harness may resolve this.

  4. 04

    Cracked or Damaged Glass Assembly

    Part replacement

    Physical damage to the glass assembly can disrupt the integrated LED circuit even if the LED component itself is intact. Visible cracks or damage to the glass surface near the indicator area are a sign this is the cause.

  5. 05

    Control Board Output Failure

    Part replacement

    If the control board is not supplying the correct signal to drive the LED, the indicator will fail even though the glass assembly is undamaged. This is a less common cause and is typically considered after the glass assembly and wiring have been ruled out.

See the test procedure for each cause

Frequently asked questions about E31

What does E31 mean on a Wolf cooktop?
E31 indicates a failure in the ON LED for Generator 1 burner zones, which covers the Right, Right Rear, and Right Center burner positions. The cooktop disables the affected burner when this error appears because it cannot confirm proper status indication. The fix depends on whether the LED has physically failed or whether the error was caused by a temporary electronic fault.
Can I fix E31 on my Wolf cooktop myself?
Running LED Test 1 and performing a reset are steps a knowledgeable DIYer can attempt. If the test shows a failed LED, replacing the glass assembly requires disassembly of the cooktop and comfort working with integrated electronic components, so many owners prefer to have a qualified technician handle that repair. Wiring connections can also be checked and reseated if you are comfortable working inside the appliance with the power disconnected.
Is it safe to use my Wolf cooktop while E31 is active?
The cooktop automatically disables the affected burner zones (R, RR, RC) when E31 is present, so those specific burners will not operate. Other burner zones not associated with Generator 1 may still function normally. It is best to resolve the error before relying on the cooktop for regular use, and you should not attempt to override the fault.
Will resetting the cooktop clear the E31 error?
A reset can clear E31 only if the underlying LED hardware is still functioning correctly. The recommended process is to perform LED Test 1 first: if all LEDs pass, a reset should resolve the error. If one LED fails the test, the fault is a hardware failure and a reset will not permanently clear the code because the glass assembly needs to be replaced.
How much does it cost to repair a Wolf cooktop E31 error?
If only a reset is needed after a successful LED test, there is no parts cost and labor is minimal. If the glass assembly requires replacement, parts costs for Wolf glass assemblies typically range from several hundred dollars into the higher hundreds depending on the specific cooktop model, with additional labor costs on top of that. Diagnosing whether the issue is a simple reset or a parts replacement will help you get an accurate estimate from a service provider.

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