Code 26-31 External EEPROM Write Failure - Equipment configuration cannot be saved.

What does 26-31 mean?

The PCM (Processor Control Module) stores vital equipment configuration data in its non-volatile EEPROM memory. This code indicates a failure in writing information to this memory, which can only be resolved by replacing the PCM.

• Faulty EEPROM memory on the PCM board.
• Damaged PCM board preventing data storage.

Click steps to track your progress.

1. 1

   This fault typically requires replacement of the PCM board.

2. 2

   Contact a qualified Carrier service technician to diagnose the issue.

3. 3

   Arrange for the PCM board to be replaced with a new, functioning unit.

4. 4

   Ensure the new PCM is properly configured for your system after installation.