This site is not affiliated with Haier; this is an independent explanation.
A Haier AC error code list helps only once you match it to your own model. Haier uses letter and number codes such as E1, E2, F4 or F6 on the indoor display or as blinking lights, and the same code can have a different meaning on a window AC, a fixed speed split and a DC inverter split.
So this page does two things. It shows how the codes are usually grouped, which helps you guess the area of the fault, and it lists the checks that are safe for anyone to do. The exact meaning of each code should be confirmed in your user manual, on the sticker behind the front panel or with Haier authorised service. Anything that touches the outdoor unit, boards, wiring or gas is for a trained technician.
Common causes
1Temporary power or voltage glitch
How to tellCode showed once after a cut or tripped breaker, cooling was fine before
What fixes itDrop the breaker for ten minutes, then restart a single time
2Sensor or connector problem
How to tellCooling stops or acts oddly and the same code shows at the same stage
What fixes itTechnician checks the sensor reading and the plug it sits in
3Indoor fan or motor problem
How to tellWeak airflow, noise from the indoor unit, or the fan not turning
What fixes itClean the filter, then call service if the fan stays slow
4Indoor and outdoor units not communicating
How to tellIndoor half powers up, outdoor half sleeps, alert shows soon after
What fixes itGlance at the outdoor isolator, then service for the link and boards
5Outdoor or inverter side protection
How to tellCompressor stops, code appears in hot weather or after heavy use
What fixes itClear airflow around the unit; service for coil, fan and board checks
6Low refrigerant or blocked system
How to tellWeeks of poor cooling, frost on pipes, then an alert
What fixes itOnly a technician can find a leak and recharge the system
How to fix it, step by step
Write down the exact code and the AC type
Note the letters, whether they are steady or blinking, and whether you own a window, split or inverter model. The model name is on the indoor unit label. Without it, any list you find online is a guess.
Restart with a proper power reset
Stop the AC with the remote, flip the main breaker off, and leave things for ten minutes. Then restore power and run cool mode. A glitch from a cut or a surge goes away, while a genuine fault comes back.
Wash the indoor filters
Open the front grille, slide out the filters, rinse them with plain water, dry in shade and put them back. Blocked filters cause weak airflow and some protection alerts.
Glance at the outdoor unit from afar
Stand back and look: is the outdoor isolator on, and is anything leaning on the grille? That is all. The casing stays closed, hands stay out and no wire gets touched.
Try a milder setting
Set 24 degrees with auto fan and watch for ten minutes. A code that appears only on the coldest setting hints at load or heat, while one that appears at once points to a sensor, board or wiring issue.
Match the code to your manual
Open the error table for your own model number. If the booklet is lost, ask Haier authorised service and quote the model. A table written for another series can mislead you.
Book authorised service for repeating codes
A code that returns after a reset is a real fault. Stop restarting and book a visit, quoting the code, the model and the date it began, so the engineer arrives with the right part.
Haier AC error code list: how the codes are grouped
Codes are not one fixed list for every unit. On most split models, E codes tend to point to the indoor side or to sensors, while F codes tend to point to the outdoor or inverter side. That is a pattern, not a rule, and some models mix them.
| Code family | Usual area on most models | What you can do |
|---|---|---|
| E codes (E1, E2 and so on) | Indoor sensors, fan or communication | Reset once, clean filters, then service |
| F codes (F4, F6 and so on) | Outdoor unit, inverter or protection | Reset once, clear airflow, then service |
| Blinking lights, no letters | Count of flashes matches a table | Count carefully and check the manual |
Common Haier codes people search for
People most often look up the Haier AC E1 error code and the Haier AC E2 error code among the E series, and the Haier AC F3 error code, Haier inverter AC F4 error code, Haier AC F6 error code and Haier AC F8 error code among the F series. Inverter models add F19, F12 and F28 to the searches. Treat any Haier inverter AC error code list you find as a hint only, and a Haier inverter AC F6 error code entry is no exception. If you need E7, read Haier AC E7 error.
The inverter runs for a few minutes, the outdoor sound dies and the display shows F4. Reset once. If it returns, remember that F codes usually mean the outdoor or inverter area, and ask service to test it instead of opening anything.
Haier AC self cleaning not working
Self cleaning is started from the remote and often works only when the AC is idle or in certain modes. If it will not begin, try fresh remote batteries, confirm the unit has power and read the self clean page of your manual, since the steps differ by model. A fault code on the display blocks it too.
Window AC versus split and inverter units
A window AC keeps the compressor and fan in a single box, so codes usually involve sensors and the thermostat. A split or inverter AC has two boxes and a link between them, so the outdoor part can raise the alert. Dust, power swings and heat trouble every type. When cooling is poor with no code at all, go to AC not working.
Safety and warranty notes
Gas filling, board repair, wiring and compressor tests are for trained technicians. Opening the casing yourself risks shock and may end your cover. While under warranty, ring Haier authorised service first.
Other brands sit together on the AC error codes hub.
Frequently asked questions
Where do I get the Haier AC error code list for my own unit?
Open the user manual for the exact model, or phone Haier authorised service with the model number on the label. Lists written for other series can be wrong for yours.
What does the Haier AC F4 error code mean?
F codes tend to point at the outdoor or inverter side, but what F4 exactly says depends on your model. Read the manual, reset one time, and ring service if it persists.
What is the Haier inverter AC E6 error code?
E6 meaning varies by model, so confirm it in the manual. Many E codes relate to indoor sensors or communication, which is why a power reset and service check are the safe route.
Can I fix a Haier AC error code myself?
Your part is limited to a power reset, washing the filters and clearing space around the outdoor unit. Gas, boards and wiring belong to a trained technician.
Why does the Haier AC show an error after a power cut?
A surge or dip can confuse the control boards. Drop the breaker for ten minutes and try again. If the code stays, something may have been stressed and needs checking.