LG Air Conditioner
LG AC CH27 error
Overcurrent / compressor overload
Try a reset once. If it comes back, a trained technician should repair it.
Also shown as: 27
What it means
The AC drew more current than is safe, so it shut down to protect the compressor and wiring.
Common causes
- Low or unstable voltage
- Dirty outdoor coil making the compressor work harder
- Weak compressor or capacitor
- Faulty inverter board
Try this at home first
Tick each step as you go
When to call a technician
If it repeats, a technician must check the voltage, compressor current and board.
Safety first
Always switch off at the wall socket or MCB before touching any part. Do not open the outdoor unit, control boards or gas pipes yourself — they carry high voltage and pressure.
Frequently asked questions
What does CH27 mean on a LG Air Conditioner?
Overcurrent / compressor overload. The AC drew more current than is safe, so it shut down to protect the compressor and wiring.
Can I fix LG Air Conditioner error CH27 myself?
You can try a reset first: Switch off for 15 minutes, check the voltage/stabilizer, then restart. If the code returns, call a technician.
Is it safe to keep using the Air Conditioner with CH27?
Avoid repeated restarts; running with this fault can cause more damage.
Other LG AC codes
Sources
We write every explanation in our own words from these references.
Last checked: 2026-10-20