SplitAtlas

Error-code hub

Haier error codes

Haier Arctic Series systems show an alphanumeric code on the indoor unit. Only 3 codes are published in Haier's homeowner-facing documentation for the systems we track. Haier and GE Appliances share hardware in this category, so the GE Appliances pages cover a much larger code set from the same platform and will usually apply to an equivalent Haier system.

See Haiermini-splits ->Common FirstError Codes
Status displays
0
Error codes
3

Unit applicability

Match your unit before reading the table

This table is sourced for Arctic Series Premium Highwall. If your unit is a different generation or product line not named here, the same display code may vary by generation.

Arctic Series Premium Highwall2 models

Common codes first

Most broadly applicable documented codes

Ranking basis: we do not have failure-frequency telemetry. These are ordered by breadth of affected systems in the SplitAtlas catalog - the documented product line's published model count, whether the same code appears on more than one product line, and any manual applicability notes we hold. This is a breadth ranking, not a popularity claim.

AC

Haier's installation instructions say that when a refrigerant leak or other leak-sensor related error is detected, the indoor fan runs at high speed and the outdoor compressor turns off. In Haier's leak-sensor verification, a disconnected leak sensor while the system is powered on makes the indoor unit display Ac.

Stop useTechnician
Breadth evidence
2 published catalog models on its documented product line.
Safe first check
Turn the system off if you suspect a refrigerant leak, notice unusual odor, hear hissing, or see oil staining. Keep the area ventilated, do not open the cabinet, and call a licensed HVAC technician.
View the fix
BA

Haier's indoor installation instructions warn that missing the required leak-sensor setup step will result in error code bA. In Haier's leak-sensor verification, disconnecting the leak sensor before powering the system on makes the indoor unit display bA, turn the indoor fan to high speed, and turn the outdoor compressor off.

Stop useTechnician
Breadth evidence
2 published catalog models on its documented product line.
Safe first check
Do not open the indoor unit or try to reconnect the leak sensor. Turn the system off and call the installing contractor or a licensed HVAC technician.
View the fix
E7

Haier's outdoor installation instructions warn that failing to follow the wiring guidelines can damage the control board and cause communication issues, including E7. The manual specifically calls out improper wire size, solid-core wire, midline splicing, and poor terminal connections.

AdvisoryTechnician
Breadth evidence
2 published catalog models on its documented product line.
Safe first check
Power the system off once at the breaker only if you can do that safely. Do not open wiring covers or touch the interconnect wiring.
View the fix

Haier mini-splits

Use the Haier catalog to connect these manual error codes to current model pages and replacement options.

See Haiermini-splits ->

All error codes

AC

Haier's installation instructions say that when a refrigerant leak or other leak-sensor related error is detected, the indoor fan runs at high speed and the outdoor compressor turns off. In Haier's leak-sensor verification, a disconnected leak sensor while the system is powered on makes the indoor unit display Ac.

Stop useTechnician
Sourced Jul 2026
Applies to
Arctic Series Premium Highwall
Homeowner fix
Turn the system off if you suspect a refrigerant leak, notice unusual odor, hear hissing, or see oil staining. Keep the area ventilated, do not open the cabinet, and call a licensed HVAC technician.
When to call a pro
Call a licensed HVAC technician for any Ac display. Tell them Haier ties Ac to the refrigerant leak sensor being disconnected during powered operation or another leak-sensor related error.
View the fix ->

BA

Haier's indoor installation instructions warn that missing the required leak-sensor setup step will result in error code bA. In Haier's leak-sensor verification, disconnecting the leak sensor before powering the system on makes the indoor unit display bA, turn the indoor fan to high speed, and turn the outdoor compressor off.

Stop useTechnician
Sourced Jul 2026
Applies to
Arctic Series Premium Highwall
Homeowner fix
Do not open the indoor unit or try to reconnect the leak sensor. Turn the system off and call the installing contractor or a licensed HVAC technician.
When to call a pro
Call a licensed HVAC technician for any bA display. Tell them Haier links bA to missing leak-sensor setup or a leak sensor disconnected before power-up.
View the fix ->

E7

Haier's outdoor installation instructions warn that failing to follow the wiring guidelines can damage the control board and cause communication issues, including E7. The manual specifically calls out improper wire size, solid-core wire, midline splicing, and poor terminal connections.

AdvisoryTechnician
Sourced Jul 2026
Applies to
Arctic Series Premium Highwall
Homeowner fix
Power the system off once at the breaker only if you can do that safely. Do not open wiring covers or touch the interconnect wiring.
When to call a pro
Call a licensed HVAC technician if E7 returns after one reset, appeared after installation, or appears with breaker trips. Tell them Haier identifies E7 as a communication issue tied to wiring guideline failures.
View the fix ->