LG AC Error Codes Guide
A Family from Jacobabad - July 2013
A family from Jacobabad called me in July 2013. The temperature was 52 degrees, one of the hottest places in Pakistan. Their LG AC was showing CH02 error. The AC was not cooling at all. The father said "My children are suffering. Please help." I asked them to check the indoor pipe sensor. They found that a lizard had died inside the unit and damaged the sensor wire. They replaced the wire and cleaned the sensor. The AC started working. They were so grateful.
Error: CH02 | Fix: Replace damaged sensor wire
LG is a globally renowned brand with a strong presence in Pakistan. LG air conditioners are known for innovative technology and energy efficiency. This guide covers all common LG AC error codes with detailed troubleshooting steps for Pakistani conditions.
Quick Tip: LG ACs display error codes as CH followed by numbers like CH01, CH02. Some models use blinking LED patterns. Count the blinks to identify the error code before resetting.
A Government Officer from Khuzdar - September 2015
A government officer from Khuzdar called me in September 2015. He said "My LG AC is showing CH07 error. The outdoor unit is not responding. The AC turns on but no cooling." I asked him to check the communication wire between indoor and outdoor units. He found that goats had damaged the wire. He repaired the wire connection. The error went away. He said "I was about to call a technician from Karachi. You saved me time and money."
Error: CH07 | Fix: Repair damaged communication wire
LG AC Error Codes Quick Reference
| Error Code | Meaning | Common Fix | Difficulty |
|---|---|---|---|
CH01 | Indoor air sensor | Replace sensor | Easy |
CH02 | Inlet pipe sensor | Replace sensor | Easy |
CH03 | Outlet pipe sensor | Replace sensor | Easy |
CH04 | Outdoor air sensor | Replace sensor | Medium |
CH05 | Outdoor pipe sensor | Replace sensor | Medium |
CH06 | Compressor discharge | Call technician | Hard |
CH07 | Communication error | Check wiring | Medium |
CH10 | Compressor drive | Call technician | Hard |
CH14 | Outdoor fan motor | Check capacitor | Medium |
A Hotel Owner from Swat - August 2017
A hotel owner from Swat called me in August 2017. He said "My LG AC is showing CH14 error. The outdoor fan is not spinning. The compressor is running but the AC is not cooling." I guided him to check the fan capacitor. He opened the outdoor unit and found the capacitor was bulging. He bought a new capacitor for 400 rupees. He replaced it himself. The fan started working. He said "You saved my hotel guests from the heat. I will never forget your help."
Error: CH14 | Fix: Replace outdoor fan capacitor
Detailed Error Code Guide
Error Code CH01
Meaning: The sensor that measures room temperature has failed.
Solutions: Turn off power. Locate sensor behind front panel near air intake. Check connections. Measure resistance at room temperature. Normal reading is 5 to 10 kilo-ohms at 25 degrees. Replace sensor if faulty.
Error Code CH02
Solutions: Disconnect power. Locate inlet pipe sensor clipped to refrigerant pipe entering indoor coil. Check connections and measure resistance. Replace sensor if faulty.
Error Code CH03
Solutions: Locate outlet pipe sensor on refrigerant pipe leaving indoor coil. Check connections and measure resistance. Replace sensor if faulty.
A Businessman from Lasbela - May 2019
A businessman from Lasbela called me in May 2019. He said "My LG inverter AC is showing CH10 error. The AC turns on but the compressor is not running. It is very hot in my shop." I asked him to check the mains voltage. He measured it and found only 165 volts. The voltage was too low for the inverter. I told him to install a voltage stabilizer. He bought a stabilizer for 6,000 rupees. The AC started working properly. He said "Now I understand why my AC was not working. Thank you for your honest advice."
Error: CH10 | Fix: Install voltage stabilizer
Error Code CH04
Solutions: Turn off power to outdoor unit. Locate outdoor air sensor behind grille near air intake. Check for visible damage or corrosion. Measure resistance. Replace sensor if faulty.
Error Code CH05
Solutions: Locate pipe sensor on outdoor condenser coil. Check connections which may be corroded from weather. Measure resistance. Replace if faulty.
Error Code CH06
Solutions: Turn off AC and let compressor cool. Clean outdoor condenser coil. Locate discharge sensor on compressor discharge line. Check connections. Replace sensor if faulty. If error continues, refrigerant may be low. Call technician.
Error Code CH07
Solutions: Turn off both units at circuit breaker for 15 minutes. Check all wiring connections. Look for animal damage to communication cable. Ensure connections are tight. If wiring is good, one of the PCBs may need replacement. Install a voltage stabilizer for protection.
A Housewife from Hub - June 2021
A housewife from Hub called me in June 2021. She said "My LG AC is showing CH01 error. The AC is running but not cooling properly. The display shows the wrong temperature." I told her to check the room temperature sensor. She opened the front panel and found the sensor was covered with dust. She cleaned it with a soft cloth. The error went away. The AC started cooling. She said "I am a housewife and I fixed my own AC. Thank you for empowering me."
Error: CH01 | Fix: Clean dusty sensor
Error Code CH10
Meaning: Problem with the compressor drive circuit in inverter models.
Solutions: Check mains voltage. It should be 190 to 250 volts. If voltage is low, install a voltage stabilizer. Let the unit cool and reset. If the error continues, the inverter board or compressor may need professional diagnosis.
Professional Only: Inverter compressor issues require specialized diagnostic equipment.
Error Code CH14
Solutions: Turn off power to outdoor unit. Remove debris around fan. Check if fan rotates freely. Test fan capacitor with multimeter. Replace if faulty. If capacitor is good, the motor may need replacement.
Frequently Asked Questions
Pakistan Specific Tips: LG inverter ACs have wide voltage range but a stabilizer is still recommended. Clean filters every 2 weeks in dusty areas. Check for animal damage to wiring, which is common in many areas. In extreme heat above 45 degrees, it is normal for ACs to run continuously. For professional service, use authorized LG service centers.
Safety Warning: Always disconnect power before any inspection. For compressor, refrigerant, or PCB issues, always call certified technicians. Inverter systems have high voltage DC that can be dangerous.