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F2

LG Portable Air Conditioner

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

LG Portable AC F2 Error — Coil Sensor Fault

What Does This Error Mean?

F2 on an LG portable AC means the indoor coil temperature sensor has shorted, opened, or is reading out of range. The unit shuts down to prevent uncontrolled coil freezing. The sensor needs replacement to clear F2 — typically a service-only fix.

Affected Models

  • LG LP1419IVSM
  • LG LP1417GSR
  • LG LP1018WNR
  • LG DUAL Inverter Portable
  • LG LP1218GXR

Common Causes

  • Failed indoor coil temperature sensor (NTC thermistor)
  • Sensor wiring damaged or disconnected
  • Loose sensor connector at the indoor PCB
  • Moisture intrusion at the sensor
  • PCB input fault (rare)

How to Fix It

  1. Power off and unplug for 5 minutes.

    Disconnect power and wait. A power-cycle clears soft F2 events from a transient sensor read. Restore power and try cooling — if F2 returns, the sensor is genuinely faulty.

  2. Move to a different outlet.

    Voltage issues can occasionally cause sensor reads that look like F2. Try a different outlet on a different circuit. Often this rules out outlet-related issues.

  3. Inspect for visible damage.

    Look around the AC for any signs of liquid spillage or impact damage. Persistent F2 after a known impact suggests internal damage that needs professional inspection.

  4. Book service for sensor replacement.

    Persistent F2 needs a technician with access to LG parts. Sensor replacement is straightforward but requires casing removal. Total typical cost USD 150–250 fitted.

  5. Consider unit age before authorising repair.

    Portable ACs typically have 5–8 year economic life. If your unit is over 6 years old and out of warranty, weighing repair cost against a new unit (USD 400–800) often favours replacement.

When to Call a Professional

F2 requires opening the portable AC casing to access the sensor — moderate DIY for those experienced with appliance repair, or book service. Sensors cost USD 15–40 plus labour USD 100–150.

Frequently Asked Questions

Will my LG portable AC keep cooling with F2?

No — F2 disables cooling. Without the coil sensor, the unit cannot prevent freezing damage so it stops the compressor. Fan-only mode may still work as a temporary air-circulation solution.

How can I tell if F2 is the sensor or wiring?

Without testing, you cannot. A technician with a multimeter can measure the sensor resistance (out of range = sensor) vs continuity (open = wire). Both fixes cost similar amounts in labour, so service the unit to find the actual cause.