Fisher & Paykel OB24SDPX1 Code E128: EEPROM Communication Error

What E128 means

On the Fisher & Paykel OB24SDPX1 built-in 24-inch oven, E128 reports an I2C error from the EEPROM. The control board could not communicate with its memory chip, which stores settings the oven needs. The display shows E128, and the oven may not start or may behave unpredictably until the control can read its memory. Settings such as the clock may also reset, and the oven can seem unresponsive.

Common causes of E128

A momentary memory read error during start-up
A power dip or surge that disturbed the control
An EEPROM that has failed on the control board
A control board with damaged communication lines

✓ One safe check you can try

1. Switch the oven off at the breaker, wait at least a minute, and turn it back on. 2. Set the clock again and try a short bake. 3. If E128 clears and stays away, no more action is needed. 4. If the code returns, leave the breaker off and call us. Do not remove the control or any trim to look at it.

! Why to stop there

A memory error on the control board usually means the board itself needs repair or replacement.
The control carries mains voltage and is not an owner repair.
We confirm the board is the cause before quoting a replacement.
Work is priced in writing first and backed by a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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E128E128 questions

What is an EEPROM?

It is a small memory chip on the control board that holds the oven's settings. E128 means the board could not read it correctly over its internal communication line.

Will a reset fix E128?

Sometimes, if it was a one-time glitch. If the code returns after a reset, the memory or the board is probably failing and needs a technician.

Is the whole oven ruined?

No. This points to the control board. The cavity, elements and door are usually fine, and we explain the repair cost before doing anything. The probe and wiring are not affected.