LG
Short Cycling / Improper Capacity Control
Indoor unit frequently turns on and off (short cycling) without reaching set temperature.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Oversized unit for room size, Blocked return or supply airflow, Faulty room temperature sensor placement, Incorrect thermostat or remote settings
How to Fix / Troubleshooting
Safety: Turn off power before moving sensors or opening covers.
Steps:
- Check airflow: Ensure no furniture or curtains block the indoor unit's intake or discharge.
- Verify setpoint and mode: Avoid setting the temperature extremely low; use a moderate setpoint and AUTO fan mode.
- Inspect room sensor: If the room thermistor is accessible, ensure it is not touching the coil or located where cold air blows directly on it.
- Clean filters and coil: Restricted airflow can cause rapid temperature swings at the sensor.
Technician involvement: If short cycling persists, a technician should check sensor calibration, refrigerant charge, and system sizing.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Room Thermistor
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