When your air conditioner displays an error code, it's trying to tell you something. Understanding these codes can help you diagnose problems quickly and decide whether to DIY or call a professional.
Common Error Code Categories
Communication Errors (E1, E2, E3)
These indicate problems between the indoor and outdoor units. Common causes:
- Loose wiring connections
- Damaged communication cables
- Control board issues
DIY potential: Check connections; call tech if persists
Sensor Errors (E4, E5, E6)
Temperature sensor malfunctions:
- E4: Room temperature sensor
- E5: Evaporator sensor
- E6: Outdoor temperature sensor
DIY potential: Can replace sensors yourself for 200-500 THB
Refrigerant Errors (E7, E8)
Low refrigerant or pressure problems. Signs include:
- Ice forming on pipes
- Weak cooling
- Compressor cycling frequently
DIY potential: No—requires licensed technician
Motor/Fan Errors (E9, F1)
Fan motor problems in indoor or outdoor unit:
- Fan not spinning
- Unusual noises
- Overheating
DIY potential: Check for debris; motor replacement needs tech
Brand-Specific Codes
Different brands use different code systems. Our tool covers Daikin, Mitsubishi, LG, Samsung, Panasonic, Carrier, and more.
Look Up Your Error Code
Use our Error Code Lookup Tool to find your specific code. For repair guidance, check our DIY Repair Guide.