中文
含义
化霜加热器故障——蒸发器化霜加热管不工作，导致蒸发器结冰严重、冷量下降。
常见原因
- 化霜加热管内部断路烧毁
- 化霜保险（热熔断器）熔断
- 化霜继电器或双向可控硅损坏
- 化霜温控器接触不良
- 加热管与蒸发器之间的导热铝箔脱离
- 主控板化霜控制电路故障
自助排查
- 断电后用万用表测量化霜加热管两端阻值，正常应有几十欧姆
- 检查化霜保险是否导通（室温下应导通）
- 观察冷冻室蒸发器结冰是否异常严重
- 可尝试强制进入化霜模式测试加热器是否发热
- 若加热管断路，需更换同型号化霜加热组件
English
Meaning
Defrost heater failure — evaporator defrost heating element not working, causing severe ice buildup and reduced cooling performance.
Common Causes
- Open-circuit failure of the defrost heating tube
- Blown defrost thermal fuse
- Defective defrost relay or triac
- Poor contact in the defrost thermostat
- Detached thermal aluminum foil between heater and evaporator
- Faulty defrost control circuit on the mainboard
Self-Check Steps
- Power off and measure the defrost heater resistance with a multimeter; it should read tens of ohms
- Check the thermal fuse for continuity (should be conductive at room temperature)
- Observe whether the freezer evaporator has excessive ice buildup
- Try manually forcing a defrost cycle to test whether the heater warms up
- If the heater is open-circuit, replace the defrost heater assembly with the same specification