AC Error Codes: What to Do
Inverter ACs show a code like E1, F1, H6 or a blinking light when something is wrong. The same code can mean different things on different brands, so always check your model's manual. Below are brand-by-brand tips for Haier, Dawlance, Gree, Orient, PEL, TCL and Kenwood.
Updated 11 November 2026
Why codes differ by brand
Haier, Gree, PEL, TCL, Dawlance, Orient, Kenwood and others each use their own code lists, and they can change between series. An "E6" on one brand may be a communication fault and on another a sensor fault. The manual that came with your AC, or the brand's helpline, is the only reliable source.
Common types of fault behind codes
- Temperature sensor faults (indoor or outdoor)
- Communication fault between the indoor and outdoor units
- High or low pressure / gas problems
- Over-current or voltage protection
- Outdoor fan or compressor protection
- Indoor fan motor faults
Safe steps before calling service
- Note the exact code or the number of blinks.
- Switch the AC off at the breaker for 5 minutes, then on again.
- Check the voltage; many codes appear on very low or high voltage.
- Clean the filters and make sure the outdoor unit is not blocked.
- If the code returns, call the brand's service with the code and model number. Do not open the units yourself.
Haier AC error codes
Most Haier HSU models list Wi-Fi, and its codes show on the indoor unit display. The code list changes between Haier series, so read it from the manual for your exact HSU model number, printed on the sticker on the side of the indoor unit. Give the helpline both the indoor and outdoor model numbers. See Haier AC prices.
Dawlance AC error codes
Dawlance sells many ranges (Aeromax, Chillex, Cruise+, Elegance Pro, Mega T3 Pro and more), and each can use its own code table. Note the range name and the number on the indoor unit (for example 15 or 30), then check the manual that came in the box. If you lost it, the Dawlance helpline can tell you the meaning once you give the model. See Dawlance AC prices.
Gree AC error codes
Almost every Gree model on this site lists Wi-Fi and a T3 compressor. Gree codes are letters plus numbers on the indoor display, and the same code can mean different things on different Gree series. Use the manual for your GS model number. Codes about the outdoor unit or the gas side need a trained technician. See Gree AC prices.
Orient AC error codes
Most Orient models here are T3 inverters from the Divine, Infinity, King and Ultron ranges. When a code appears, write down the range name and the model on the indoor unit sticker before you call. Low voltage is a common cause of temporary codes in summer, so check the supply first. See Orient AC prices.
PEL AC error codes
PEL sells many 1 and 1.5 ton ranges (Ace Pro, Atom, Cool Pro, Fit, Jumbo and others), mostly with T3 compressors. Codes and their meanings are listed in the PEL manual for each range. Do not guess from another brand's list, because the same letters can mean a different fault. See PEL AC prices.
TCL AC error codes
TCL's TAC models cover basic, T3 Pro and AI ranges, and about half of them list Wi-Fi. Check the code table in the manual for your TAC model number, since codes can change between ranges. See TCL AC prices.
Kenwood AC error codes
Kenwood's range includes wall splits (KES, KEL, KGP, KLP) and floor-standing units. Floor-standing models can use a different code list from the wall splits, so match the manual to the exact model. Note the code and how long the AC ran before it appeared. See Kenwood AC prices.
Related help
AC not cooling, AC gas refill guide, AC remote settings.
E1 to E7 and F1 to F4: what these codes usually mean
People search for codes such as E1, E2, E4, E5, E7, F1, F4, EC, FF and CH05. Their exact meaning changes by brand, but they usually fall into the same groups:
- E or F with a low number: often a temperature sensor or communication fault.
- Codes about voltage or current: often linked to low voltage or a power surge.
- Codes about the outdoor unit: compressor, fan or gas pressure protection.
- Blinking lights instead of a code: the number of blinks is the code.
Always match the code to your own model's manual. A code that clears after a breaker reset and does not return was probably caused by the supply.
