LG aircon error codes: what the CH codes mean
LG aircon CH codes point to the part with a problem: a sensor, the outdoor compressor or circuit board, a fan motor, the wired remote or the drainage. LG Singapore explains them across three help pages: its sensor and compressor error codes page, its fan motor error codes page and its CH03 and CH04 page for ceiling-mounted units. Some codes start with E or F instead of CH, and LG groups them with the CH codes that mean the same thing.
| Code | What LG says it means | What you can do |
|---|---|---|
| CH01, CH02, CH06, CH12, CH41 to CH48 (also E1, E2, E3, E7, E8, F2, F3) | A sensor problem | Reset; if the code returns, stop using the unit |
| CH21, CH23, CH26, CH29 (also E9) | An outdoor unit compressor or circuit board problem | Reset; if the code returns, stop using the unit |
| CH10, CH67 (also E6, EF) | An indoor or outdoor fan motor problem | Remove visible debris from the exposed fan, then reset |
| CH03 (ceiling-mounted units) | A wired remote control problem | Check the manual; book a repair if the code stays |
| CH04 (ceiling-mounted units) | A drainage problem | Clean the filter and keep the drainage path clear |
Before you reset or call anyone, write down the exact code and your unit's model, so a repair company can check what the code means for that model.
LG's reset step
For basic LG aircon troubleshooting, LG Singapore's help page on sensor and compressor codes gives one reset. Unplug the unit or switch off its circuit breaker, wait about five minutes, restore power and check whether the code returns. If it persists, LG says to stop using the unit and contact LG Support, because a repeated error may point to an internal circuit or wiring problem.
If the aircon's breaker has tripped on its own, switch the aircon off at the remote, then push the tripped switch back up once. If it trips again straight away, leave it off and call a Licensed Electrician.
For the fan motor codes CH10 and CH67, LG's fan motor page says to check the exposed fan for visible debris and carefully remove it before the reset. Do not open any panel or cover.
For a flashing light rather than a code, see the aircon blinking light guide.
CH04: drainage
LG's CH03 and CH04 help page, which covers ceiling-mounted air conditioners, says CH04 points to a drainage problem. The causes it lists are the drain pump, a drain hose that is blocked or slopes upward, or a dirty filter. To prevent CH04, LG says to clean the filter every two weeks and keep the drainage path clear.
You can clean the filter yourself: see how to clean an aircon filter. Do not try to fix the drain pump or hose. If CH04 comes back after you have cleaned the filter and reset the unit, stop using it and book a repair.
If you also see water dripping from the indoor unit, see aircon leaking water for what to check.
Other brands
This guide covers LG codes only. Daikin uses its own codes, which are explained in the guide to Daikin aircon error codes. For any other brand, look up the code in that brand's manual rather than matching it to the LG table above. Before you call a company, note three things: the brand, the model and the exact code shown. If your home has units from more than one brand, check each code against its own brand's list. When you book, ask the company whether it works on that brand.
Warranty and repair rates
Check your warranty before you book: LG's fan motor error codes page says a service fee may apply if the product is out of warranty. The directory's published repair and troubleshooting rates are below.
FROM THE HOMEZYPRO DIRECTORY
Published aircon repair and inspection rates
For the most common unit (per job), the lowest published rates from 11 companies run from S$40 to S$100. Each figure is one company's own advertised rate with its conditions, not a market average or a quote.
See 21 published repair or inspection rates and sources
| Company | Service as listed | Rate | Source |
|---|---|---|---|
| Skyzone Aircon Pte Ltd | Aircon diagnosis fee (residential) | S$27.25 per visit | skyzone.com.sg |
| Snowflake Services LLP | Diagnostic visit (waived if you proceed) | S$30 per visit | snowflakeaircon.sg |
| City Cooling Pte Ltd | Checking | S$35 per unit | citycoolingengr.com.sg |
| A-Max Aircon | Troubleshooting | S$40 per job | amaxaircon.com |
| Blossom Engineering & Construction Pte. Ltd. | Troubleshooting | S$40 per job | blossomaircon.com |
| Coolest Aircon Service Pte Ltd | Aircon Repair | S$40 per visit | coolestaircon.com.sg |
| Doctor Cool | Aircon repair or troubleshooting | S$40 per job | doctorcoolsg.com |
| SmartCool Aircon Servicing Singapore | Troubleshooting | S$40 to S$80 per job | smartcool.sg |
| Thetop Aircon Service | Aircon troubleshooting repair | From S$40 per job | thetop.com.sg |
| Goodcool | Aircon Troubleshooting | S$43.60 per job | bestairconservicing.com |
| Aircon Boon | Ttroubleshooting [sic] | S$50 per job | airconsg88.com |
| Sky Blue Aircon Engineering Pte. Ltd. | Troubleshooting & diagnostics visit (from; waived upon repair) | From S$50 per visit | skyblueaircon.com |
| Jiaxing Holdings Pte. Ltd. | Onsite inspection checking fee (waived if the repair proceeds within 1 month) | S$54.50 per visit | jiaxing-aircon.sg |
| Heng Aircon Pte Ltd | Diagnostic check | S$60 per visit | hengaircon.com |
| Same Day Aircon Servicing Repair | Repair troubleshooting (fix quoted separately) | From S$60 to S$80 per job | urgentairconservicing.sg |
| Vois Pte. Ltd. | Aircon troubleshooting | From S$60 per unit | vois.com.sg |
| Airple | Aircon Troubleshooting | S$60.60 per job | airple.com.sg |
| Lion City Air Conditioner Services | Gas troubleshooting | S$87.20 per job | lioncityaircon.sg |
| Joydom Engineering Pte. Ltd. | On-site troubleshooting visit | S$100 per job | joydom.com.sg |
| Cool-Aire Aircon Servicing | VRF Troubleshooting - On site survey / Transport charges | S$150 per visit | coolaire.com.sg |
| Homeone Aircon | Compressor replacement labour, split (<3hp), parts excluded | S$600 per unit | homeone.com.sg |
In the directory, 21 companies publish a repair or inspection line. Of these, 11 price it per job, and their lowest published rates run from S$40 to S$100 per job. S$43.60 per job is the middle company's published rate. The table shows each company's lowest matching rate as printed, so check what each price covers.
NEXT STEP
See aircon companies in the directory with their published prices, the areas they say they cover and their sources.
Compare aircon companiesThe lines cover different services. "Aircon diagnosis fee (residential)" is S$27.25 per visit. Some fees are waived if the repair goes ahead, such as "Diagnostic visit (waived if you proceed)" at S$30 per visit. "Repair troubleshooting (fix quoted separately)" is printed as From S$60 to S$80 per job, and "Compressor replacement labour, split (<3hp), parts excluded" is S$600 per unit.
Ask what the visit includes, whether a diagnosis fee is waived if you go ahead, and whether parts are extra. See the aircon repair cost guide for more, or compare companies for aircon repair.
Questions
Why does my LG aircon show CH05?
This guide cannot say, because the LG help pages it uses do not list CH05. Codes vary by model, so check your unit's manual or ask LG Support. If the code comes back after a reset, stop using the unit and book a repair.
Can I keep using the aircon with an error code?
Not if the code persists. LG's sensor and compressor codes page says to reset the unit first. If the code stays, stop using the unit and contact LG Support, as a repeated error may point to an internal circuit or wiring problem. Do not keep restarting it.
Will a power cut cause an LG error code?
It can. LG's sensor and compressor codes page says a temporary power issue can trigger some CH codes. If a code shows after power returns, follow LG's reset: switch off at the breaker, wait about five minutes and restore power. If the code returns, stop using the unit and book a repair.
How do I see the error code on an LG remote?
It varies by model, so check the manual for your unit and remote. LG notes on its page for ceiling-mounted units that settings menus may vary by model. Once you find the code, write it down exactly with the model, so you can give both to a repair company.
Does LG charge to repair an error code?
It can. LG's fan motor error codes page says a service fee may apply if the product is out of warranty. Check your warranty papers before you book, and ask LG Support what applies to your unit and what the fee covers.
Can a general aircon company fix LG error codes?
It can if it works on LG units, so ask that first. In the directory, 21 companies publish a repair or inspection line, and none of those lines is specific to LG. Give the company the exact code and model, and check your warranty terms before you book.
Prices come only from the sourced company rates in the HomezyPro directory, shown with each company and its source.
Practical guidance for planning a home job in Singapore. Company prices come from the HomezyPro directory, each linked to its source; rules and safety points link to the agency or manufacturer that sets them. This is not a site inspection, a quote or professional advice for your home.
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