E0
Daikin Indoor Unit EEPROM / Configuration Error

Daikin furnace shows E0; unit may not respond to thermostat or may be locked out.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Corrupted configuration data on Daikin main PCB, Incorrect or mismatched replacement control board, Power surge causing memory error, Faulty EEPROM chip on board

How to Fix / Troubleshooting

Safety: Turn off power to the furnace before handling the control board.

Steps to check:

  • Power reset: Turn off power for at least 10 minutes to allow the control to fully discharge, then restore power and see if E0 clears.
  • Verify board part number: If the board was recently replaced, confirm that the Daikin PCB part number matches the furnace model and that any required DIP switch or jumper settings are correct per the installation manual.
  • Check for surge damage: Look for signs of burnt components or discoloration on the board that may indicate surge damage.

EEPROM/configuration errors usually require a new, correctly programmed Daikin control board. Contact a Daikin-authorized technician to replace and configure the board.

Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

Daikin Furnace Main Control Board (EEPROM)
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements