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This page continues our comprehensive guide to AC error codes for all major air conditioner brands, covering additional models and error variations not included on the first page. If you were unable to find your specific AC error code earlier, you can explore the extended brand-wise list below for further reference.
Air conditioners may display different types of error codes depending on the model, inverter technology, PCB configuration, and protection systems. These codes often indicate sensor malfunctions, indoor and outdoor communication failures, compressor protection activation, refrigerant leakage detection, voltage irregularities, inverter module faults, or fan motor issues. Understanding the correct meaning of the displayed code helps prevent unnecessary part replacement and avoids further damage to the unit.
Even though some AC error codes represent temporary protection modes, others require immediate professional inspection. If your AC repeatedly shows an error code, stops cooling, produces unusual noise, or shuts down automatically, it is advisable to avoid continuous restart attempts and seek expert technical support.
At TMS Service Center (The Mechanic Squad), we provide reliable AC repair services in Chennai with just ₹99 inspection charge and 6-month service warranty, ensuring accurate diagnosis, transparent pricing, and genuine spare parts for all leading AC brands. Our experienced technicians handle inverter and non-inverter split AC systems across residential and commercial locations.
You can also refer to Page 1 of our All Brand AC Error Codes guide to review previously listed brands and error explanations.
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor unit communication fault.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor error.
F5 – Outdoor condenser overheat protection activated.
H3 – Compressor overload protection.
H5 – Inverter module protection activated.
H6 – Indoor fan motor lock error.
H7 – Outdoor fan motor lock error.
P0 – Inverter module protection fault.
P1 – Voltage abnormal (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Electrical box overheating error.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation).
Onida Split AC Error Codes List
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor ambient temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor unit communication failure.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor fault.
F5 – Outdoor condenser overheat protection.
H3 – Compressor overload protection activated.
H5 – Inverter module protection error.
H6 – Indoor fan motor lock.
H7 – Outdoor fan motor lock.
P0 – Inverter module protection fault.
P1 – Voltage protection (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Outdoor electrical box overheating.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation, not a fault).
H00 – No abnormality detected (normal operation).
H11 – Communication error between indoor and outdoor unit.
H12 – Capacity mismatch between indoor and outdoor units.
H14 – Indoor room temperature sensor fault.
H15 – Outdoor compressor temperature sensor error.
H16 – Outdoor current transformer (CT) sensor fault.
H19 – Indoor fan motor lock error.
H21 – Indoor float switch or water overflow fault.
H23 – Indoor heat exchanger temperature sensor error.
H24 – Indoor pipe temperature sensor fault.
H25 – Nanoe / air purification system abnormality (if equipped).
H27 – Outdoor air temperature sensor fault.
H28 – Outdoor heat exchanger temperature sensor error.
H30 – Outdoor discharge temperature sensor fault.
H33 – Incorrect indoor/outdoor unit connection error.
H36 – Outdoor pressure switch malfunction.
H38 – Refrigerant leakage detected.
H39 – Outdoor heat sink temperature sensor fault.
H41 – Abnormal wiring connection detected.
H46 – Outdoor current sensor error.
H59 – ECO sensor malfunction (if equipped).
F90 – Power factor correction (PFC) protection activated.
F91 – Refrigeration cycle abnormality detected.
F93 – Compressor rotation abnormality.
F95 – Outdoor heat exchanger overheat protection.
F96 – Outdoor transistor module temperature high.
F97 – Compressor discharge temperature too high.
F98 – Total running current protection activated.
F99 – DC peak current protection activated.
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor ambient temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor communication failure.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor fault.
F5 – Outdoor condenser overheat protection activated.
H3 – Compressor overload protection activated.
H5 – Inverter module protection error.
H6 – Indoor fan motor lock error.
H7 – Outdoor fan motor lock error.
P0 – Inverter module protection fault.
P1 – Voltage protection (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Outdoor electrical box overheating.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation).
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor ambient temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor communication failure.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor fault.
F5 – Outdoor condenser overheat protection activated.
H3 – Compressor overload protection activated.
H5 – Inverter module protection error.
H6 – Indoor fan motor lock error.
H7 – Outdoor fan motor lock error.
P0 – Inverter module protection fault.
P1 – Voltage protection (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Outdoor electrical box overheating.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation).
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor ambient temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor communication failure.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor fault.
F5 – Outdoor condenser overheat protection activated.
H3 – Compressor overload protection activated.
H5 – Inverter module protection error.
H6 – Indoor fan motor lock error.
H7 – Outdoor fan motor lock error.
P0 – Inverter module protection fault.
P1 – Voltage protection (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Outdoor electrical box overheating.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation).
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor ambient temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor communication failure.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor fault.
F5 – Outdoor condenser overheat protection activated.
H3 – Compressor overload protection activated.
H5 – Inverter module protection error.
H6 – Indoor fan motor lock error.
H7 – Outdoor fan motor lock error.
P0 – Inverter module protection fault.
P1 – Voltage protection (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Outdoor electrical box overheating.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation).
E0 – Indoor and outdoor communication error.
E1 – Indoor room temperature sensor fault.
E2 – Indoor coil temperature sensor error.
E3 – Indoor fan motor malfunction.
E4 – Indoor EEPROM memory error.
E5 – Indoor unit overload protection activated.
E6 – Outdoor ambient temperature sensor fault.
E7 – Outdoor condenser temperature sensor error.
E8 – Outdoor fan motor malfunction.
E9 – Outdoor communication failure.
F0 – Refrigerant leakage detected or low gas condition.
F1 – Indoor ambient temperature sensor error.
F2 – Indoor pipe temperature sensor fault.
F3 – Compressor discharge temperature high.
F4 – Outdoor heat exchanger temperature sensor fault.
F5 – Outdoor condenser overheat protection activated.
H3 – Compressor overload protection activated.
H5 – Inverter module protection error.
H6 – Indoor fan motor lock error.
H7 – Outdoor fan motor lock error.
P0 – Inverter module protection fault.
P1 – Voltage protection (high/low voltage).
P2 – Compressor top temperature protection.
P4 – Inverter compressor drive error.
P5 – Outdoor high temperature protection.
L3 – Outdoor electrical box overheating.
L8 – Inverter compressor malfunction.
dF – Defrost mode active (normal operation).
A1 – Indoor PCB malfunction.
A3 – Drain system malfunction or water overflow detected.
A5 – Freeze protection activated (indoor heat exchanger).
A6 – Indoor fan motor fault.
A9 – Electronic expansion valve error.
C4 – Indoor heat exchanger temperature sensor fault.
C5 – Indoor pipe temperature sensor error.
C9 – Indoor room temperature sensor malfunction.
E1 – Outdoor PCB malfunction.
E3 – High pressure protection activated.
E4 – Low pressure protection activated.
E5 – Outdoor unit overload protection.
E6 – Outdoor fan motor error.
E7 – Outdoor DC fan motor fault.
E8 – Outdoor overcurrent protection.
E9 – Outdoor electronic expansion valve error.
F3 – Compressor discharge pipe high temperature error.
F6 – Outdoor heat exchanger temperature error.
H6 – Compressor motor position detection error.
H8 – Outdoor current transformer (CT) sensor error.
H9 – Outdoor air temperature sensor fault.
J3 – Discharge pipe temperature sensor error.
J6 – Outdoor heat exchanger sensor fault.
L3 – Electrical box temperature rise error.
L4 – Inverter heat sink overheat error.
L5 – Inverter compressor overcurrent error.
P1 – Power supply voltage abnormal.
P3 – Compressor discharge temperature abnormal.
U0 – Refrigerant shortage detected.
U2 – Power supply voltage error.
U4 – Communication error between indoor and outdoor unit.
Yes, The Mechanic Squad (TMS) offers same-day doorstep Air Conditioner (AC) service within 90 minutes
It’s a technician visit fee, fully waived if you proceed with the repair.
We handle All Makes & Models Split Air Conditioner (AC), Non Inverter Air Conditioner (AC) & Inverter Air Conditioner (AC).
We provide expert repair and service support for all major brands including LG, Samsung, Daikin, Voltas, Blue Star, Hitachi, Panasonic, Whirlpool, Godrej, Haier, Carrier, Toshiba, Mitsubishi Electric, Mitsubishi Heavy Industries, O General, Onida, Lloyd, IFB, Videocon, Kelvinator, Sharp, Sansui, Croma, Amazon Basics, Mitashi, BPL, Electrolux, General, AUX, Hisense, Sanyo, Akai, Intex, TCL, Hyundai, Micromax, Vestar, Super General, Cruise, Napoleon, Koryo, MarQ (Flipkart), Realme TechLife, Xiaomi (Mi AC), OnePlus AC and more — covering all latest and old models across Chennai and Tamil Nadu.
Yes, 6-Month warranty is provided on all service and spares.
“Excellent AC service. My split AC was not cooling properly and the technician fixed the gas leakage issue quickly. Very professional and clean work.”
Raja , Tambaram
“Booked AC repair for my LG inverter AC. They identified the PCB issue within minutes and explained everything clearly before repair. Totally satisfied.”
Sathish Kumar, Vdapalani
“My window AC had water leakage problem. TMS team came same day and resolved it at affordable cost. Cooling is perfect now.”
Jenifer, T.Nagar
“Very happy with their AC servicing. Complete cleaning and maintenance done properly. Technician was polite and experienced.”
Shanmugam, Selaiyur
“Compressor issue in my Daikin AC was fixed professionally. Transparent pricing and only ₹99 inspection charge. Highly recommended AC service in Chennai.”
Sheela, Ramapuram
These reviews are from real customers who have chosen TMS Service Center for fast and reliable Air Conditioner (AC) service in Chennai.
TMS Service Center (The Mechanic Squad) provides trusted AC repair services across Chennai, Coimbatore, Madurai, Chennai, Trichy, Salem, Erode, Tirunelveli, Vellore, Thanjavur, Hosur, and major cities throughout Tamil Nadu. We specialize in split AC, window AC, inverter AC, and non-inverter air conditioner repair services with professional doorstep support. We also offer AC gas refilling, installation, uninstallation, PCB repair, and preventive maintenance services across Tamil Nadu with just ₹99 inspection charge and same-day service support.
📞Book Your Air Conditioner (AC) Repair Services in Tamil Nadu Today – Call TMS Service Center Now for ₹99 Inspection & Same-Day Service!
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