LG Air Conditioner Code CH00: Needs Inspection After Reset
On LG air conditioners, a blinking LED or a CH 00 message on the screen means the unit needs inspection, and the first step is a power reset of five minutes. The code does not name…
- Code
- CH00
- Appliance
- Room Air Conditioner
- Brand
- LG
- Warranty
- 30-day workmanship
What CH00 means
On LG air conditioners, a blinking LED or a CH 00 message on the screen means the unit needs inspection, and the first step is a power reset of five minutes. The code does not name a particular sensor or circuit, so it works as a general alert from the control system. The owner sees the light flashing or the CH 00 text, and the unit may stop cooling or refuse to start after the reset. Window and portable units show it on the panel; others show it on the indoor display.
Common causes of CH00
- Temporary power or control glitch that a reset clears
- A control board alert that returns after the reset
- A sensor or connection problem that the control board cannot name
1. Unplug the unit, or switch its circuit breaker off. 2. Wait a full five minutes. 3. Plug it back in or restore the breaker, then start cooling. 4. Watch whether the LED stays steady and CH 00 stays away.
- If CH 00 returns after the reset, the control board has found something it cannot clear, and we read it with the unit running.
- We check the sensor connections and the control board output before suggesting any part.
- You get a written price before work starts, and repairs carry our 30-day workmanship warranty.
Other Room Air Conditioner codes
What should I do first when CH 00 appears?
Cut power for five minutes, either by unplugging the unit or switching its breaker off, then restore it. A temporary glitch often clears this way, and the display shows whether it comes back.
Is it safe to keep running the unit with CH 00?
If the code clears after the reset and cooling is normal, running it is fine. If the LED keeps blinking or the unit shuts off again, leave it off until it has been inspected.
Does CH 00 point to one broken part?
No. The code only says the unit needs inspection. We find the cause by testing sensors, connections, and the control board rather than guessing at a part.
Still seeing CH00?
A technician diagnoses it on site and gives you the price in writing before any work starts.