Haier E2

High

E2 = heat-exchanger (indoor coil) temperature sensor failure (open/short circuit) — not a specific icing/anti-freeze protection code per Haier's service manual.

Haier E2: E2 = heat-exchanger (indoor coil) temperature sensor failure (open/short circuit) — not a specific icing/anti-freeze protection code per Haier's service manual. This fault noticeably affects operation.

Possible causes

Dirty filter / low airflow
Refrigerant shortage
Indoor fan too slow/faulty

Check steps

Clean filter, ensure airflow
Check charge, measure evaporator sensor

Affected parts

Verdampfer
Filter
Fühler

Safety note

Allow defrosting before service.

Source: Haier resmi servis kılavuzu — DÜZELTİLDİ: Haier Ductless Split Air Conditioner Service Manuals — confirmed independently in two separate model manuals: (1) HSU09VHG(DB)-W Service Manual, "Error Codes and Description Indoor Display" table, p.46 (ManualsLib host: manualslib.com/manual/963562/Haier-Hsu09vhg-Db-W.html?page=4…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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