中文
含义
化霜加热器故障。化霜加热器电路异常，通常与E4关联但更具体指向加热器本身或其供电回路开路。蒸发器无法除冰，导致结冰严重。
常见原因
- 化霜加热器内部电阻丝熔断
- 加热器端连接器烧蚀碳化导致接触不良
- 加热器供电线路从主板到蒸发器之间开路
- 加热器接地端锈蚀断裂
- 玻璃管加热器碎裂导致断路
自助排查
- 断电后拆下冷冻室内胆背板，找到蒸发器下方的化霜加热器
- 目视检查加热器表面有无明显断裂或烧焦痕迹
- 用万用表电阻档测量加热器两端，开路则需更换
- 注意加热器功率通常为150-300W，更换须用同规格
English
Meaning
Defrost heater failure. The defrost heater circuit is abnormal, specifically the heater element or its power supply path is open. Without the heater, the evaporator cannot be defrosted, causing severe ice buildup.
Common Causes
- Broken internal resistance wire inside the defrost heater
- Burned and carbonated heater connector causing poor contact
- Open circuit in the heater supply wiring between main board and evaporator
- Corroded and broken heater ground terminal
- Cracked glass-tube-type heater causing open circuit
Self-Check Steps
- Power off, remove the freezer inner back panel, and locate the defrost heater under the evaporator
- Visually inspect the heater for visible breaks or burn marks
- Measure heater resistance with a multimeter — open circuit means replacement is needed
- Heater power is typically 150-300W; always replace with the exact same specification