Haier System Messages

Complete Troubleshooting & Repair Guide

Control Lock Messages
LOCK
Child Lock Enabled
  • Press and hold the lock button for 3–5 seconds.
  • Check control panel lock function settings.
  • Disconnect power if buttons are unresponsive.
  • Inspect keypad for stuck keys.
Temperature Messages
HOT
High Temperature Warning
  • Allow appliance to cool down completely.
  • Check ventilation openings for blockage.
  • Ensure fan system is operating normally.
  • Avoid restarting until temperature stabilizes.
COOL
Cooling Cycle Active
  • Wait for cooling cycle to finish.
  • Do not unplug during operation.
  • Ensure proper airflow around unit.
  • Restart only after cycle completes.
Power & System Messages
PF
Power Failure Detected
  • Check household power supply.
  • Inspect circuit breaker and outlet.
  • Reset appliance after power is restored.
  • Use surge protection if outages are frequent.
RESET
System Restart Required
  • Turn appliance OFF and ON again.
  • Unplug for 5–10 minutes.
  • Reconnect and restart system.
  • Check if error returns.
System Error
ERR
General Appliance Error
  • Perform full power reset.
  • Check for other error codes displayed.
  • Inspect wiring and control board.
  • Contact technician if unresolved.
Important: If the message continues after troubleshooting, disconnect power immediately and contact a certified Haier service technician.