中文
含义
E24 故障代码表示干衣机 NTC（负温度系数）温度传感器检测到短路状态。NTC 传感器的电阻值随温度升高而降低，短路时电阻读数接近零欧姆，控制系统误判为极端高温从而强制停止加热。与 E21 不同，E24 专门指示 NTC 类型传感器的短路故障而非开路故障。
常见原因
- NTC 传感器内部击穿或绝缘失效，导致正负极之间电阻接近零。
- 传感器两根引线之间的绝缘层破损，裸露导线直接接触造成短路。
- 传感器连接器内部进水或受潮，导致引脚间漏电形成低阻通路。
- 传感器金属外壳与引线碰触，造成对地短路。
- 主控板 NTC 检测回路中滤波电容击穿，表现为传感器短路假象。
自助排查
- 断开电源，拔下 NTC 传感器连接器，用万用表电阻档测量传感器两端；正常室温下阻值应在 10kΩ–15kΩ 之间，若接近 0Ω 则传感器短路损坏。
- 目视检查传感器引线是否彼此接触或绝缘层磨损裸露，必要时用热缩管分别绝缘。
- 检查连接器内是否潮湿或有水迹，用吹风机低温档吹干后重新测试阻值是否恢复正常。
- 测量传感器外壳与任意引线之间的绝缘电阻，应大于 1MΩ，否则表示内部漏电需更换传感器。
- 若更换传感器后 E24 仍然出现，测量主控板 NTC 接口引脚间是否有短路或电容击穿痕迹，必要时更换主控板。
English
Meaning
Error code E24 indicates a short circuit condition in the dryer’s NTC (Negative Temperature Coefficient) temperature sensor. Because NTC resistance decreases as temperature rises, a near-zero reading tricks the control board into detecting extreme high temperature, forcing a heating shut-down. Unlike E21, E24 specifically flags a short-circuit failure of the NTC sensor rather than an open circuit.
Common Causes
- NTC sensor internally shorted or with failed insulation, showing near-zero resistance between terminals.
- Insulation damage on the sensor leads causing bare wires to contact each other directly.
- Moisture or water ingress inside the sensor connector, creating a leakage path with low resistance between pins.
- NTC sensor metal housing contacting one of the lead wires, creating a short to ground.
- Filter capacitor on the control board’s NTC detection circuit shorted, mimicking a sensor short.
Self-Check Steps
- Disconnect power, unplug the NTC sensor connector, and measure resistance across the sensor terminals with a multimeter — normal room-temperature reading is 10kΩ–15kΩ; near-zero indicates a shorted sensor.
- Visually inspect the sensor lead wires for bare spots or contact points; apply heat-shrink tubing to insulate any exposed conductors separately.
- Check the connector for moisture or water residue; dry with a hairdryer on low heat, then recheck the resistance reading for recovery.
- Measure insulation resistance between the sensor housing and each lead — should exceed 1MΩ; a lower reading indicates internal leakage requiring sensor replacement.
- If E24 persists after replacing the sensor, test the NTC pins on the main control board for a short or a shorted filter capacitor, and replace the board if necessary.