LG air conditioner E1 code: indoor pipe sensor fault (window and portable)

On LG window and portable air conditioners, E1 is an auto-stop protection code. LG says it means the indoor pipe (coil) temperature sensor has a short or open circuit, so the unit shuts off to protect itself.

Likely causes

Listed from most to least common.

1. Indoor coil temperature sensor failed
2. Sensor wire loose or damaged
3. Control board fault
4. Temporary power glitch

How to fix the E1 code

Unplug the air conditioner or switch it off at the breaker before removing any panel or filter.

1. 1

   Step 1: Unplug the unit

   Unplug the air conditioner and wait at least 2 minutes, as LG advises.

2. 2

   Step 2: Plug in and restart

   Plug it back in and start it in Cool mode. If it runs normally, the code was a one-off.

3. 3

   Step 3: Book a repair if it returns

   If E1 comes back, stop using the unit and contact LG service or a technician.

When to call a technician

If E1 returns after unplugging, the sensor or control board needs replacing. This means opening the cabinet, so book a technician.

A typical repair for this code costs $120–$300 in the US, including parts and labor. Prices vary by area and model.

Models this applies to

• Ductless mini-splits (wall-mounted and Art Cool)
• Multi-zone mini-split systems
• Window air conditioners
• Portable air conditioners

Codes can differ slightly between models. Your owner's manual is the final word and is available from LG support.

Common questions