中文
含义
2H 表示洗碗机在规定时间内未能排空内部积水（通常排水阶段限时 2-3 分钟）。通用电气洗碗机使用独立排水泵（非与主洗泵共用），排水阶段主控板启动排水泵电机，同时通过水位压力开关监测水槽内水位下降。若在超时后水位仍高于最低设定值，主控板判定排水系统故障，显示 2H 代码并暂停程序，此时打开门会看到机内残留积水。
常见原因
- 排水管路堵塞：食物残渣、油脂块或异物（碎玻璃、牙签等）卡在排水管内、排水泵叶轮腔或排水止回阀处，完全阻断排水路径。
- 厨房水槽排水管连接处（气隙装置或垃圾处理器入口）被食物残渣堵死，洗碗机排水无法进入家庭排水系统。
- 排水泵电机绕组烧毁或启动电容失效，主控板供电正常但泵不转动；断电后用手拨动泵叶轮可能感受到卡滞或完全转不动。
- 排水泵叶轮被异物（碎玻璃、小餐具、骨头碎块）卡死，泵电机发出”嗡嗡”声但叶轮无法旋转。
- 水位压力开关（接在集水槽底部的细软管）至集水槽的气管脱落、弯折或内部被油脂堵塞，无法向主控板传递真实水位信号，主控板误认为已排空而停止排水泵。
- 排水软管在柜体后方安装过高（超过洗碗机排水口高度 1.2 米/4 英尺以上）、被压扁或形成”U”形存水段形成虹吸障碍，排水泵扬程不足。
自助排查
- 打开门检查机内积水情况：若水面高度超过过滤网，首先用容器舀出积水至少许可视液面位置。
- 拆下底部过滤网和过滤板，清理滤网及集水槽内的食物残渣和异物，特别检查集水槽底部排水泵入口是否有异物堵住。
- 检查水槽下方洗碗机排水软管整段：确认软管没有弯折、压扁，且与垃圾处理器或排水三通连接处无堵塞；若通过气隙装置排水，取下气隙盖清理内部堵塞物。
- 从垃圾处理器接口上拧下排水软管，将软管末端放入一个大桶中，启动洗碗机排水程序：若水能正常排入桶内，说明洗碗机内部正常，堵塞在家庭排水管道一侧。
- 断电后拆下前面板，找到排水泵（通常位于水槽底部中央偏前），用手指或螺丝刀伸入泵入口尝试拨动叶轮：正常应能轻松转动；若卡死，取出异物。
- 检查排水泵电机的接线端子是否松动或锈蚀；如有万用表，断电后测量排水泵电机两端电阻：正常约 20-40 Ω，若开路则泵电机已烧毁需更换排水泵总成。
English
Meaning
2H indicates that the dishwasher has failed to drain the internal water within the specified time (typically a 2–3 minute drain window). GE dishwashers use a dedicated drain pump (separate from the main wash pump). During the drain phase, the main control board energizes the drain pump motor while monitoring the tub water level drop via the water level pressure switch. If the water level remains above the minimum threshold after the timeout, the control board identifies a drain system fault, displays code 2H, and pauses the cycle. Opening the door at this point will reveal standing water inside the tub.
Common Causes
- Clogged drain path: food debris, grease masses, or foreign objects (broken glass, toothpicks, etc.) are lodged in the drain hose, the drain pump impeller chamber, or the drain check valve, completely blocking the drainage path.
- The dishwasher drain connection point at the kitchen sink (air gap device or garbage disposal inlet) is completely blocked with food waste, preventing the dishwasher discharge from entering the household drain system.
- The drain pump motor winding is burned out or the start capacitor has failed; the control board supplies power normally but the pump does not run. With power off, manually turning the pump impeller may feel jammed or completely immovable.
- The drain pump impeller is seized by debris (broken glass, small utensil, bone fragment); the pump motor produces a humming sound but the impeller cannot rotate.
- The air hose from the water level pressure switch (connected to the sump at the tub bottom) has come off, is kinked, or is internally clogged with grease, failing to transmit the true water level signal to the control board. The control board incorrectly believes the tub is empty and stops the drain pump prematurely.
- The drain hose is routed too high behind the cabinet (exceeding 1.2 m / 4 ft above the dishwasher’s drain port), is crushed, or has formed a U-shaped trap causing a siphon obstruction; the drain pump cannot overcome the head pressure.
Self-Check Steps
- Open the door and check the standing water inside: if the water level is above the filter screen, first use a container to bail out enough water to see the sump area clearly.
- Remove the lower filter screen and filter plate; clean away food debris and foreign matter from the filter and sump area. Pay particular attention to whether the drain pump inlet at the bottom of the sump is obstructed by debris.
- Inspect the entire dishwasher drain hose run under the sink: confirm the hose is not kinked or crushed, and that the connection to the garbage disposal or drain tee is free of blockage. If draining through an air gap device, remove the air gap cover and clean out any internal blockages.
- Disconnect the drain hose from the garbage disposal inlet fitting, place the hose end into a large bucket, and start a dishwasher drain cycle: if water drains normally into the bucket, the dishwasher internals are normal and the blockage is on the household drain side.
- With power disconnected, remove the front lower panel, locate the drain pump (typically centered near the front of the tub bottom), and reach a finger or screwdriver into the pump inlet to try turning the impeller: it should spin freely; if seized, remove the obstruction.
- Check whether the drain pump motor terminal connections are loose or corroded; if you have a multimeter, measure the drain pump motor resistance with power disconnected: the normal range is approximately 20–40 Ω. An open-circuit reading means the pump motor has burned out and the drain pump assembly must be replaced.