Fisher & Paykel Oven Error Code E128

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.

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.

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.

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.

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.