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Error code reference

Wolf Cooktop Error Code E43

Generator 1 burner (R, RR, RC) temperature sensor open; affected burner shuts down.

Wolf codesWolf cooktop codes

Generator 1 burner (R, RR, RC) temperature sensor open; affected burner shuts down.

First step from the service manual

Change affected generator board.

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

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What E43 means on a Wolf cooktop

Error code E43 on a Wolf cooktop indicates that the temperature sensor circuit for Generator 1 is open. Generator 1 covers the burners designated R (right), RR (right rear), and RC (right center), depending on the cooktop configuration. When the control system detects an open circuit in the temperature sensor associated with this generator board, it immediately shuts down all affected burners on that generator to prevent uncontrolled heating conditions. The temperature sensor is a critical safety and performance component that provides real-time feedback to the generator board, allowing it to regulate ignition and flame behavior.

An open circuit in the sensor means the signal path between the sensor and the generator board has been broken. This can result from a failed sensor element, a broken or disconnected wiring harness, corroded terminals, or an internal failure within the generator board itself. Because the cooktop relies on continuous sensor feedback to operate safely, it will not allow the affected burners to run in this fault state. The burner shutdown is intentional and protective.

The recommended first diagnostic step is to replace the affected generator board. This is because the generator board integrates the sensor monitoring circuitry, and a fault can originate internally within the board rather than in the external sensor wiring alone. Before swapping the board, a technician should inspect the sensor wiring harness for visible damage, corrosion at connector pins, or loose connections. If the wiring checks out intact, the generator board is the primary suspect and should be replaced to resolve the E43 fault.

Source: manufacturer service documentation.

Common causes of E43

  1. 01

    Failed Generator Board

    Part replacement

    The generator board contains the internal circuitry that monitors the temperature sensor. An internal board failure can break the sensor circuit even when external wiring appears intact, making the board the most likely cause and the recommended starting point for repair.

  2. 02

    Open or Broken Sensor Wiring Harness

    Part replacement

    A break, kink, or burn in the wiring harness connecting the temperature sensor to the generator board will create an open circuit. Inspect the full harness routing for visible damage, pinched wires, or heat-related deterioration.

  3. 03

    Corroded or Loose Connector Pins

    Wiring / connection

    Moisture, grease, or heat cycling can cause corrosion or loosening at the harness connectors. Check all connector terminals for oxidation, bent pins, or incomplete seating, and clean or reseat as needed.

  4. 04

    Failed Temperature Sensor

    Part replacement

    The temperature sensor itself may have developed an open in its internal element, which breaks the signal circuit. If wiring and connectors check out, the sensor should be tested and replaced if found to be out of specification.

See the test procedure for each cause

Frequently asked questions about E43

What does E43 mean on a Wolf cooktop?
E43 indicates that the temperature sensor circuit for Generator 1 has been detected as open by the cooktop control system. Generator 1 is associated with the right-side burners (R, RR, RC). Because the cooktop cannot receive valid temperature feedback, those burners are automatically shut down as a safety precaution. The fault points to either a wiring issue, a failed sensor, or a faulty generator board.
Can I fix the E43 error myself?
Some preliminary checks, like inspecting the wiring harness for visible damage or reseating loose connectors, are within reach of a knowledgeable DIYer. However, the primary repair involves replacing the generator board, which requires disassembling the cooktop and working with electrical components. Most homeowners should have a qualified appliance technician handle this repair.
Is it safe to use my Wolf cooktop while it shows E43?
The cooktop automatically shuts down the affected burners when E43 is active, so those burners will not operate. Other burners on a separate generator may still function. Do not attempt to bypass the shutdown, as the cooktop is protecting against an unmonitored heating condition. Stop using the affected burners and arrange for service.
Will resetting the cooktop clear the E43 error?
A power reset may temporarily clear the fault display, but E43 will return as soon as the control system re-detects the open sensor circuit during normal operation. The underlying hardware problem, whether the generator board, wiring, or sensor, must be corrected before the error will clear permanently. Resetting without repair is not a solution.
How much does it cost to repair an E43 error on a Wolf cooktop?
Repair costs depend on whether the issue is a wiring problem or a full generator board replacement. Wiring and connector repairs are generally less expensive, while a generator board replacement will include both the part cost and labor. Total repair costs typically range from $150 to $500 or more, depending on parts pricing and technician rates in your area.

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