What to Check First
- Different measurements from the remote controller sensor and the indoor unit’s cause both outside and inside units to continually operate.
- As hot air expands, it gets lighter and moves upward, when it gets cold, it contracts and thus becomes heavier and moves downward. For this reason, the air at the top area where a wall mounted type air conditioner head unit is mounted is rather hot but the air in the space underneath where customers move about is usually colder.
- The sensor that detects the indoor temperature is mounted in the indoor unit thus ending up measuring relatively hot air at the top, while the temperature difference with respect to the ground floor can be in the vicinity range of 1°~3° in Celsius (2°~6° in Fahrenheit).
- The indoor temperature displayed on the remote controller (lower ground temperature) differs from the temperature measured from the air conditioner head unit’s sensor (ceiling temperature).
- The indoor temperature displayed on the remote controller is measured where the remote controller is located at that time, and it can differ from the temperature measured from the air conditioner unit.
- As the cold air fills up the ceiling area to make the temperature distribution more even, the air conditioner knows that the target temperature is reached and the outdoor unit will operate at minimum level, so that the indoor temperature does not drop any further.
- This guide was created for all LG single/multi-split air conditioner product models. Images or content presented herein may differ from your product.
Why This Can Happen
Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.
Safety and Model-Specific Guidance
Frequently Asked Questions
What should I check first for Outdoor unit keeps running [air conditioner]?
Different measurements from the remote controller sensor and the indoor unit’s cause both outside and inside units to continually operate.
When should I stop troubleshooting and contact LG?
Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.
Does this guidance apply to every LG model?
Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.
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