中文
含义
3H 表示洗碗机进水水流不足或进水速度过慢，未在规定时间内达到目标水位。通用电气洗碗机通过进水电磁阀控制进水，同时由流量计或水位压力开关检测进水速度和水位。若主控板在程序设定的进水阶段结束时检测到水量未达标，但不属于完全无水（那会触发 FTD 代码），系统判定为进水缓慢故障，显示 3H 代码。机器可能仍尝试继续运行，但洗涤效果会明显下降。
常见原因
- 家庭供水水压过低（低于 20 psi / 1.4 bar），进水流量不足以在规定时间内向机内注入所需水量，常见于老旧小区或用水高峰期。
- 进水电磁阀入口滤网被水垢、泥沙或铁锈部分堵塞，滤网透水面积减小导致进水速度大幅下降。
- 进水电磁阀阀芯动作迟缓或开度不足：阀芯密封垫片老化膨胀或弹簧疲软，阀体虽通电但未完全打开。
- 进水软管内部橡胶衬层老化后剥离、内壁结垢导致有效管径变窄，等效于管路节流。
- 流量计叶轮被泥沙卡滞转动阻力增大，虽然水正常流入但主控板接收到的流量脉冲信号低于预期值。
自助排查
- 检查家中其他水龙头水流是否正常：若整体水压偏低，待水压恢复后重新运行洗碗机；若仅洗碗机进水慢，继续以下步骤。
- 关闭供水角阀，从洗碗机端拧下进水软管，检查软管接头的黑色橡胶垫圈是否老化变形，同时观察软管内部是否有衬层剥离或严重积垢。
- 在进水阀入口处找到不锈钢细网滤网（与软管接头对接的位置），用小螺丝刀或尖嘴钳小心取出，在流水下用旧牙刷刷洗干净后装回。
- 将进水软管一端放入桶中，缓缓打开供水角阀，观察出水流量和喷射力度：正常应有强有力的水流；若出水细弱无力，问题在供水端或软管本身而非洗碗机内部。
- 若水流正常但机器仍报 3H，断电拆下前面板，检查进水电磁阀线束接头是否松动；通电启动进水阶段时，手摸阀体应能感受到轻微的振动和”嘶嘶”水流声，若阀体无任何反应可能为线圈老化或主控板驱动故障，需联系通用电气售后。
English
Meaning
3H indicates that the dishwasher water fill flow is insufficient or too slow, failing to reach the target water level within the specified time window. GE dishwashers control the fill process through a water inlet solenoid valve while monitoring fill rate and water level via a flow meter or water level pressure switch. If the control board detects at the end of the scheduled fill phase that the water volume is below the target but the situation does not constitute a complete no-fill condition (which would trigger code FTD), the system identifies a slow-fill fault and displays code 3H. The machine may attempt to continue running, but wash performance will be noticeably degraded.
Common Causes
- Household water supply pressure is too low (below 20 psi / 1.4 bar); the inflow rate is insufficient to deliver the required water volume within the time window. This is common in older residential buildings or during peak water-usage periods.
- The inlet valve intake screen is partially clogged with scale, sediment, or rust, reducing the effective screen area and significantly slowing the fill rate.
- The inlet solenoid valve plunger is sluggish or not fully opening: the plunger seal diaphragm has aged and swollen, or the spring has weakened; the valve receives power but does not open completely.
- The rubber lining inside the water inlet hose has aged, delaminated, or the inner wall has scaled, narrowing the effective pipe diameter — effectively a flow restriction in the line.
- The flow meter impeller is dragging due to sediment ingress, increasing rotational resistance; water flows in normally but the flow pulse signal detected by the control board is lower than expected.
Self-Check Steps
- Check whether water flow from other household faucets is normal: if overall water pressure is low, wait for pressure to recover and re-run the dishwasher. If only the dishwasher fills slowly, continue with the steps below.
- Close the water supply shutoff valve, disconnect the inlet hose from the dishwasher end, check the black rubber gasket washer in the hose connector for aging or deformation, and observe whether the hose interior shows lining delamination or heavy scale buildup.
- Locate the fine stainless steel mesh intake screen at the inlet valve port (where the hose connects), carefully extract it with a small screwdriver or needle-nose pliers, and scrub it clean with an old toothbrush under running water before reinstalling.
- Place one end of the inlet hose into a bucket, slowly open the shutoff valve, and observe the water flow rate and spray force: there should be a strong, forceful stream; a weak trickle points to a supply-side or hose problem rather than an issue inside the dishwasher.
- If water flow is normal but the machine still reports 3H, disconnect power, remove the front lower panel, and check whether the inlet solenoid valve wiring harness connector is loose. While power is on and the fill phase starts, place a hand on the valve body to feel for slight vibration and a hissing water-flow sound; if the valve body shows no response at all, the coil may be aged or the control board drive circuit may have failed — contact GE after-sales service.