A154 - Serial EEPROM Hardware Failure

What does A154 mean?

There is a hardware failure with the serial EEPROM, which stores configuration data. The unit will shut down.

• Control board failure
• Internal component failure

Click steps to track your progress.

1. 1

   Inspect the control board for any signs of damage.

2. 2

   Ensure the unit is receiving stable power.

3. 3

   Contact a qualified HVAC technician for diagnosis and potential board replacement.