Source: Beijing LG Air Conditioning After-sales Service Phone Number http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3760795. Fault Phenomenon: After the machine is powered on, it does not provide heating but can cool normally.
LG Air Conditioner: No heating, but normal cooling function.
Analysis and Maintenance: After powering on and touching the LCD screen switch, set the air conditioner to the heating mode. The indoor fan does not work, but the outdoor compressor can start and run, suggesting there might be a fault with the indoor unit. Remove the magnetic outer panel of the indoor unit and follow the principle of starting easy before difficult. First, measure the fuse resistor on the control board, which is in good condition; the secondary transformer has a 220V AC voltage output. Then check the tube temperature sensor, which shows no problem and meets the placement requirements. Finally, inspect the fan control circuit on the control board and find that capacitor C7 is damaged and leaking electricity.
Resolution: After replacing C7 with a same model capacitor and reconnecting the power supply, the air conditioner resumes heating function, and the fault is resolved.
Note: For professional maintenance, please contact authorized service providers like Beijing LG Air Conditioning Repair services.