mypros+
Error code reference

Thermador Cooktop Error Code E0202

Power board (PB) error in the microcontroller's internal memory (EEPROM)

Thermador codesThermador cooktop codes

Power board (PB) error in the microcontroller's internal memory (EEPROM) — content corrupted beyond recovery.

First step from the service manual

Replace the power board (PB).

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 E0202.

  • 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 E0202 means on a Thermador cooktop

Error code E0202 on a Thermador cooktop signals a critical failure in the power board's (PB) internal EEPROM (Electrically Erasable Programmable Read-Only Memory). The EEPROM is a small non-volatile memory chip integrated into the power board's microcontroller that stores essential operational data, including calibration settings, configuration parameters, and system state information. When this memory becomes corrupted beyond the point of recovery, the microcontroller can no longer read or write the data it needs to operate safely, and the cooktop triggers E0202 to halt operation.

EEPROM corruption at this severity level typically results from power surges or voltage spikes that write bad data to memory cells, repeated incomplete write cycles caused by intermittent power interruptions, or simple component wear and failure over time. In some cases, a manufacturing defect in the memory chip itself can cause premature failure. Because the corruption is described as beyond recovery, standard soft resets or power cycling will not resolve the condition. The stored data cannot be rewritten or repaired through any user-accessible procedure.

Since the EEPROM is physically embedded within the power board's microcontroller circuitry and is not a separately replaceable component, the entire power board must be replaced to resolve this error. Attempting to continue operating the cooktop with this fault present is not recommended, as the microcontroller cannot guarantee accurate power regulation or safe induction zone control without its configuration data intact.

Source: manufacturer service documentation.

Common causes of E0202

  1. 01

    Power board EEPROM chip failure

    Part replacement

    The EEPROM memory chip on the power board has failed or worn out, making stored data unreadable and unrecoverable. This is the primary cause of E0202 and requires full power board replacement.

  2. 02

    Power surge or voltage spike

    Part replacement

    A sudden surge in line voltage can overwrite or corrupt EEPROM memory cells in a way that cannot be reversed. Check for signs of electrical burning or discoloration on the board as a secondary indicator.

  3. 03

    Interrupted power during a write cycle

    Wiring / connection

    If power is cut to the cooktop while the microcontroller is actively writing to EEPROM, the resulting incomplete write can corrupt the memory permanently. This may have been preceded by repeated tripped breakers or loose wiring.

  4. 04

    Accumulated write cycle degradation

    Part replacement

    EEPROM chips have a finite number of write cycles before cells begin to fail. On older units, normal wear over time can eventually cause irreversible data corruption, triggering E0202.

See the test procedure for each cause

Frequently asked questions about E0202

What does E0202 mean on a Thermador cooktop?
E0202 indicates that the power board's internal EEPROM memory has become corrupted beyond recovery. The EEPROM stores critical operational data for the cooktop's microcontroller, and when that data cannot be read or restored, the system shuts down and displays this code. The fault is hardware-level and cannot be resolved through resetting or recalibration. The power board must be replaced.
Will resetting my Thermador cooktop clear the E0202 error?
No, resetting the cooktop by cycling power or flipping the circuit breaker will not clear E0202. The error is caused by permanent EEPROM memory corruption on the power board, which is a hardware failure. No amount of power cycling can repair corrupted memory cells. A replacement power board is required to resolve this fault.
Is it safe to use my Thermador cooktop while E0202 is displayed?
It is not recommended to use the cooktop while this error is active. The corrupted EEPROM means the microcontroller cannot reliably manage power delivery and induction zone control. Operating the unit under these conditions could lead to unpredictable behavior or unsafe operation. The cooktop should remain off until the power board is replaced.
How do I fix the E0202 error on a Thermador cooktop?
The required repair is replacing the power board (PB). Because the EEPROM is integrated directly into the power board's microcontroller and is not a separately serviceable component, the entire board must be swapped out. This repair is typically performed by a qualified appliance technician, as it involves disconnecting high-voltage components inside the cooktop.
How much does it cost to fix a Thermador cooktop E0202 error?
Repair costs will vary depending on the specific cooktop model and local labor rates. The power board itself typically falls in the range of $150 to $400 or more for Thermador units, and professional labor to diagnose and install the part can add $100 to $250 to the total. Getting a quote from an authorized Thermador service technician is the best way to get an accurate estimate for your specific model.

Related Thermador cooktop codes

All Thermador cooktop codes
View all 129 Thermador cooktop codes

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

Get Started

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