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Error code reference

Fisher & Paykel Oven Error Code E128

Error I2C from EEPROM.

Fisher & Paykel codesFisher & Paykel oven codes

Error I2C from EEPROM.

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What E128 means on a Fisher & Paykel oven

Error code E128 on a Fisher & Paykel oven indicates a fault on the I2C communication bus specifically related to the EEPROM (Electrically Erasable Programmable Read-Only Memory) chip. The I2C bus is a two-wire serial communication protocol used internally by the oven's control board to exchange data between the main processor and peripheral components. The EEPROM stores critical configuration data, calibration settings, and user preferences that the control board reads at startup and during operation. When the processor cannot successfully communicate with the EEPROM over the I2C bus, this error is triggered.

The EEPROM and its I2C interface are located on the main electronic control board. A failure can stem from the EEPROM chip itself becoming corrupted or failing, a fault in the I2C bus lines on the PCB (such as a short, open circuit, or damaged pull-up resistor), or issues with the power supply voltage that feeds the control board. Electrical surges, moisture ingress, or heat damage to the board can all disrupt I2C communication integrity.

Because the EEPROM holds stored settings and calibration data, this error can cause the oven to behave erratically, fail to start, or lock up entirely. In most cases, resolving E128 requires inspection or replacement of the main control board, as the EEPROM is typically soldered directly onto it. A power cycle may temporarily clear the fault if the error was caused by a transient communication glitch, but a recurring E128 points to a hardware-level failure on the control board.

Source: manufacturer service documentation.

Common causes of E128

  1. 01

    Failed or corrupted EEPROM chip

    Part replacement

    The EEPROM chip on the control board may have failed due to age, heat stress, or a power surge, making it unreadable by the processor. This is the most common hardware cause and typically requires control board replacement since the chip is soldered in place.

  2. 02

    Damaged or faulty main control board

    Part replacement

    Physical damage to the PCB traces, burnt components, or failed pull-up resistors on the I2C bus lines can disrupt communication between the processor and EEPROM. Inspect the board carefully for burn marks, corrosion, or visible component damage.

  3. 03

    Transient power supply disruption

    Wiring / connection

    A brief voltage irregularity or power surge can cause a temporary I2C communication error that clears after a full power cycle. If the error does not return after cycling power at the breaker, a transient event was likely the cause.

  4. 04

    Moisture or contamination on the control board

    Part replacement

    Steam or grease contamination reaching the control board can create leakage currents that interfere with the low-voltage I2C signal lines. Inspect the board for signs of moisture residue or corrosion around the EEPROM area.

See the test procedure for each cause

Frequently asked questions about E128

What does E128 mean on a Fisher & Paykel oven?
E128 indicates an I2C communication error involving the EEPROM chip on the oven's main control board. The EEPROM stores calibration and configuration data, and the oven's processor has lost the ability to communicate with it over the internal I2C bus. This can prevent the oven from operating normally. The fault is typically traced to the control board itself.
Can I fix E128 on my Fisher & Paykel oven myself?
A homeowner can start by performing a full power cycle, turning off the circuit breaker for 5 to 10 minutes and then restoring power to see if the error clears. If E128 returns repeatedly, the control board likely has a hardware fault and should be inspected or replaced by a qualified technician. Working inside the oven's control compartment involves exposure to high-voltage components, so professional service is recommended for anything beyond a basic reset.
Is it safe to use my Fisher & Paykel oven when E128 is displayed?
It is not advisable to use the oven while E128 is active. Because the EEPROM stores calibration and control settings, a failure to read this data could cause the oven to behave unpredictably, including incorrect temperature regulation. Discontinue use and have the oven inspected before operating it again.
How much does it cost to repair a Fisher & Paykel oven showing E128?
If the fault requires control board replacement, parts and labor costs typically range from $200 to $500 or more depending on the specific model and your location. A diagnostic service call alone generally ranges from $75 to $150. Getting a repair estimate before committing to the fix is a good idea, especially on older units.
Will resetting the oven clear the E128 error code?
A power reset by switching off the circuit breaker for several minutes may clear E128 if the fault was caused by a temporary communication glitch rather than a hardware failure. However, if the EEPROM chip or control board has a physical defect, the error will return after the reset. A recurring E128 after multiple resets confirms that component-level repair or board replacement is needed.

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