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Air Conditioner Error Codes India
30 fault codes across 5 brands — step-by-step fixes with safety warnings and tool links.
30
Error codes
5
Brands covered
35 min
Avg. fix time
33%
Beginner-friendly
About air conditioner errors in India
Air conditioner error codes spike during Indian summers (March-June) when AC usage peaks. Voltas leads AC error searches in India, followed by Samsung, LG, and Haier. Common faults include outdoor unit fan failures, refrigerant pressure drops (often misdiagnosed as gas leaks), and sensor errors from dust buildup on the evaporator coil. Split ACs need the outdoor unit cleaned every 3-4 months in dusty Indian cities. Most AC errors require intermediate skill and a basic multimeter — never work on a running outdoor unit.
Common air conditioner fault patterns
not cooling
motor / fan / magnetron fault
sensor fault
Browse by brand
All air conditioner error codes
Haier — Error E1 on a Haier split air conditioner indicates a fault with the indoor unit air temperature sensor.
30 min · intermediate
Haier — Error E2 on a Haier split air conditioner indicates a fault with the indoor evaporator coil temperature sensor.
30 min · intermediate
Haier — Error E5 on a Haier air conditioner indicates voltage protection has tripped: the input AC voltage is outside the safe operating range (typically below 180 V or above 250 V).
30 min · beginner
Haier — Error F1 on a Haier split air conditioner indicates a fault with the indoor unit fan motor.
45 min · intermediate
Haier — Error F2 on a Haier split air conditioner indicates a fault with the outdoor unit fan motor.
45 min · intermediate
Haier — Error F4 on a Haier split air conditioner indicates the compressor overload protection has tripped.
60 min · intermediate
Lloyd — Error E1 on a Lloyd split air conditioner indicates a fault with the indoor unit air temperature sensor.
30 min · intermediate
Lloyd — Error E2 on a Lloyd split air conditioner indicates a fault with the indoor evaporator coil temperature sensor.
30 min · intermediate
Lloyd — Error E3 on Lloyd air conditioners signals a compressor failure or malfunction.
15 min · beginner
Panasonic — Error F11 on Panasonic air conditioners indicates a communication failure between the indoor unit and outdoor unit.
25 min · intermediate
Panasonic — Error F91 on Panasonic air conditioners indicates the voltage protection circuit has been activated due to unstable or out-of-range mains voltage.
20 min · beginner
Panasonic — Error F95 on Panasonic air conditioners signals a compressor failure or malfunction detected by the unit's protection circuit.
15 min · beginner
Samsung — Error C5 on a Samsung split air conditioner indicates a communication failure between the indoor unit and the outdoor compressor unit.
45 min · intermediate
Samsung — Error E1 indicates a failure in the indoor unit temperature sensor (thermistor), which prevents the air conditioner from reading room temperature accurately.
25 min · beginner
Samsung — Error E101 on a Samsung air conditioner indicates the indoor unit's PCB has not received any data from the outdoor unit for the timeout period (typically 4 minutes).
60 min · advanced
Samsung — Error E458 on a Samsung air conditioner indicates the compressor overload protection has tripped.
60 min · intermediate
Samsung — Error E466 on a Samsung inverter air conditioner indicates the DC link voltage on the inverter PCB is out of safe range.
30 min · beginner
Samsung — Error E5 on Samsung air conditioners signals a compressor failure or compressor protection circuit activation.
15 min · beginner
Voltas — Error E1 on a Voltas split air conditioner indicates a fault with the indoor air temperature sensor.
30 min · intermediate
Voltas — Error E2 on a Voltas split air conditioner indicates a fault with the indoor evaporator coil temperature sensor.
30 min · intermediate
Voltas — Error E3 on a Voltas split air conditioner indicates a fault with the outdoor unit temperature sensor (typically the outdoor coil or ambient temperature thermistor).
45 min · intermediate
Voltas — Voltas split AC error E4 indicates the indoor unit temperature sensor has failed or is reading erratic values.
25 min · intermediate
Voltas — Voltas split AC error E5 indicates a communication failure between the indoor and outdoor units.
30 min · advanced
Voltas — Error E6 on a Voltas split air conditioner indicates a communication failure between the indoor unit and the outdoor compressor unit.
60 min · advanced
Voltas — Error F1 on a Voltas split air conditioner indicates a fault with the indoor unit fan motor.
45 min · intermediate
Voltas — Error F2 on a Voltas split air conditioner indicates a fault with the outdoor unit fan motor.
45 min · intermediate
Voltas — Error F3 on a Voltas split air conditioner indicates the compressor overload protection has tripped.
60 min · intermediate
Voltas — Error F4 on Voltas air conditioners signals a compressor malfunction or failure.
15 min · beginner
Voltas — Error P0 on a Voltas air conditioner indicates voltage protection has tripped: the input AC voltage is outside the safe operating range (typically below 180 V or above 250 V).
30 min · beginner
Voltas — Error P1 indicates Voltas Air Conditioner has detected abnormal voltage supply and activated its protection circuit.
15 min · beginner
Frequently asked questions
What are the most common air conditioner error codes in India?
The most frequently searched air conditioner error codes in India include Haier E1, Haier E2, Haier E5, Haier F1, Haier F2. Most of these are intermediate-level fixes that take 35 minutes on average.
Which air conditioner brands have the most error codes?
Among air conditioner brands sold in India, Voltas (12 codes), Haier (6 codes), Samsung (6 codes) have the most documented fault codes. More error codes doesn't mean less reliable — it often means better diagnostic reporting.
Can I fix air conditioner errors myself without a technician?
33% of air conditioner error codes we cover are beginner-level fixes requiring no special tools. The remaining codes need basic tools (multimeter, screwdriver set) and intermediate mechanical comfort. Every guide includes a "when to call a technician" section so you know exactly where the DIY boundary is.
Time to replace your air conditioner?
If repair cost exceeds 50% of a new unit price, replacing is usually smarter. Compare top-rated air conditioners in India.