mypros+
Error code reference

Wolf Cooktop Error Code E25

Output driver watchdog has detected an error.

Wolf codesWolf cooktop codes

Output driver watchdog has detected an error.

First step from the service manual

Cycle unit power, replace module power board.

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

MyPros+ Max

Get the full diagnostic procedure for E25.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What E25 means on a Wolf cooktop

Error code E25 on a Wolf cooktop indicates that the output driver watchdog circuit has detected a fault condition. The watchdog is a supervisory function built into the control system that continuously monitors the output driver stage of the module power board. If the watchdog detects that the output driver is not responding correctly, operating outside expected parameters, or has entered an unresponsive state, it triggers this error to halt operation and protect downstream components from damage.

The module power board is the primary component involved in this fault. This board manages power delivery to the cooktop's heating elements or induction coils by controlling output driver circuits, which regulate switching and load management. When the watchdog flags an error, it typically means the driver circuitry has experienced a logic failure, a timing fault, or a hardware-level fault such as a failed transistor or driver IC on the board. Overheating, power fluctuations, or component degradation over time are common contributing factors.

The first diagnostic step is to cycle unit power, which clears the watchdog's fault register and allows the control system to reinitialize. If the error returns immediately or shortly after power is restored, the module power board itself has likely failed and requires replacement. A recurring E25 that cannot be cleared through a power cycle is a strong indicator of a hardware fault on the board rather than a transient software or communication issue.

Source: manufacturer service documentation.

Common causes of E25

  1. 01

    Failed module power board

    Part replacement

    The output driver circuitry on the module power board has experienced a hardware failure, such as a damaged driver IC or failed transistor. This is the most likely cause when the error persists after a power cycle.

  2. 02

    Transient power surge or voltage fluctuation

    Wiring / connection

    A brief spike or drop in supply voltage can cause the watchdog to trip without permanently damaging the board. Power cycling the unit resets the fault and normal operation may resume.

  3. 03

    Overheating of the power board

    Wiring / connection

    Excessive heat buildup around the module power board can cause the output driver to behave erratically, triggering the watchdog. Check for blocked ventilation paths or failed cooling components.

  4. 04

    Firmware or logic fault in the control system

    Wiring / connection

    In some cases, a software-level timing issue within the control system can cause the watchdog to register a false fault. A clean power cycle is the first step to rule this out before assuming hardware failure.

  5. 05

    Damaged wiring or connector to the power board

    Wiring / connection

    A loose, corroded, or damaged harness connection to the module power board can interrupt signals monitored by the watchdog circuit. Inspect all connectors to and from the board for secure seating and visible damage.

See the test procedure for each cause

Frequently asked questions about E25

What does E25 mean on a Wolf cooktop?
E25 indicates that the output driver watchdog circuit has detected an error on the module power board. The watchdog is a built-in monitoring function that watches the output driver stage and shuts down the cooktop if it detects abnormal behavior. This is a protective fault designed to prevent damage to other components. The cooktop will not operate until the fault is cleared or the board is replaced.
Can I fix E25 on my Wolf cooktop myself?
The first step you can try is cycling the unit power by switching off the circuit breaker or unplugging the cooktop for at least one minute, then restoring power. If the error clears and does not return, no further action may be needed. However, if E25 comes back, the module power board will need to be replaced, which is a repair best handled by a qualified technician due to the high-voltage components involved.
Will resetting the cooktop clear the E25 error?
A power cycle reset is the recommended first step and can clear the error if the fault was caused by a transient power issue or a temporary logic fault. Turn off the breaker or unplug the unit for about one minute before restoring power. If E25 returns after the reset, the underlying hardware fault on the module power board has not been resolved and the board will need to be inspected or replaced.
Is it safe to use my Wolf cooktop when E25 is displayed?
No. When E25 is active, the cooktop's control system has detected a fault in the output driver stage and has halted normal operation as a safety precaution. Attempting to bypass or ignore this error and continue using the cooktop is not recommended, as the fault could indicate a failing power board that may pose a risk of further electrical damage. Keep the unit off until the fault is diagnosed and resolved.
How much does it cost to repair a Wolf cooktop showing E25?
Repair costs vary depending on the specific model and whether the module power board needs replacement. Board replacement parts for Wolf cooktops typically range from $150 to $400 or more, and professional labor charges generally add $100 to $200 depending on your location and the service provider. If the error clears with a simple power cycle and does not return, there may be no parts cost at all.

Related Wolf cooktop codes

All Wolf cooktop codes
View all 124 Wolf cooktop codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass