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F12 / LED1 flash 1 times

F12 - Outdoor EEPROM Error

Haier · Air Conditioners

What does F12 / LED1 flash 1 times mean?

The outdoor unit's LED1 flashes once, indicating an error with the outdoor unit's EEPROM data or the EEPROM itself is damaged. This affects the outdoor unit's main control.

Common Causes

  • Faulty EEPROM data
  • Faulty EEPROM component
  • Faulty outdoor PCB (Printed Circuit Board)

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the main power switch to the air conditioner for at least 30 seconds.

  2. 2

    Turn the power back on and restart the unit using the remote control.

  3. 3

    If the F12 error reappears, contact a qualified technician as the outdoor mainboard may require inspection or replacement.

Browse all codes in this manual (48)
Verified technical data. Last updated: April 2026

Related Faults

CL displayCL displayed on panel & remote — Self-Clean operation activatedE1E1 — Indoor temperature sensor failureE14E14 — Indoor fan failure
Source: Haier Air Conditioners
Open Manual (Page 87)Search more codes in this manual