中文
含义
FTD（Fill Time Detection）表示洗碗机在进水阶段超时——在规定时间内未能检测到有效进水或水位未达到启动洗涤所需的最低值。与 3H（进水过慢）不同，FTD 通常表示主控板完全未检测到任何进水信号（流量计无脉冲输出或水位开关信号从未变化），因此进水超时逻辑判定为完全的进水故障而非过慢。显示 FTD 后机器会中止程序并尝试排水（如排水系统正常），以防止在有漏水风险的情况下继续加热或洗涤。
常见原因
- 家庭供水角阀被完全关闭或在维修后未重新打开，洗碗机进水口无水压供应——这是 FTD 最常见也最易被忽略的原因。
- 进水电磁阀线圈完全烧毁断路或阀芯机械卡死在关闭位置，通电后阀门零开度，水根本无法进入。
- 流量计（涡轮流量传感器）叶轮完全卡死或霍尔传感器断电损坏，即使有水进入主控板也收不到任何流量脉冲信号，误判为无水进入。
- 进水阀至水槽之间的内部管路脱落或破损：例如在运输或维修后进水管未正确压入进水口，水从脱开处直接流入底盘而非水槽，水槽水位开关始终检测不到水位。
- 水位压力开关至集水槽的气管完全断开（拔脱或老鼠咬断），水槽水位上升时气压无法传递到开关，开关保持”空”状态不变。
- 主控板上进水阀驱动继电器或驱动三极管完全损坏，无法向进水电磁阀输出供电。
自助排查
- 第一步：检查供水角阀。 找到厨房水槽下方的洗碗机供水角阀（通常连接一根 3/8” 或编织不锈钢软管到洗碗机），确认手柄完全打开（与管道平行）。如果附近最近进行过水管维修，极大概率阀门被关闭后忘记打开。
- 确认家中未停水且厨房水龙头冷水出水正常。如果使用了热水供水（部分安装场景），确认热水器工作正常。
- 关闭角阀，拧下软管洗碗机端接头，查看进水阀入口不锈钢滤网：若滤网被泥沙、铁锈完全堵死，清洁后装回。
- 重新连接软管并打开角阀，断电后重启洗碗机并选择短程序。在进水阶段耳朵贴近门板或侧板仔细听：正常应有明显的”嘶嘶~“进水声；若完全无声，进水阀未打开。
- 如进水阶段有水进入的”嘶嘶”声但程序仍然超时报 FTD，说明水进入了机器但主控板未检测到信号——大概率是流量计或水位压力开关故障。新一代 GE 型号以流量计为主，旧型号以水位压力开关为主。
- 若完全无声且角阀已确认打开，需拆卸下前面板，用万用表在进水阶段测量进水电磁阀两端电压：应有 120V AC。若有电但阀无声，进水阀电磁线圈已烧毁需更换；若完全无电，故障在主控板或线束，联系通用电气售后检测。
English
Meaning
FTD (Fill Time Detection) indicates that the dishwasher has exceeded the fill timeout — within the prescribed time it has failed to detect effective water fill or the water level has not reached the minimum required to begin the wash. Unlike 3H (slow fill), FTD typically indicates that the control board has detected no fill signal at all (no pulse output from the flow meter, or the water level switch signal never changed), so the fill-timeout logic determines that this is a complete fill failure rather than a slow fill. After displaying FTD, the machine aborts the cycle and attempts to drain (if the drain system is operational) to prevent heating or washing in a potentially leak-prone condition.
Common Causes
- The household water supply shutoff valve is completely closed or was not reopened after recent maintenance; there is no water pressure at the dishwasher inlet. This is the most common and most easily overlooked cause of FTD.
- The water inlet solenoid valve coil is completely burned out and open, or the valve plunger is mechanically stuck in the closed position; when energized, the valve has zero opening and water simply cannot enter.
- The flow meter (turbine flow sensor) impeller is completely seized, or the Hall-effect sensor has lost power or failed; even if water enters, the control board receives no flow pulse signal and incorrectly determines that no water is entering.
- The internal fill tube from the inlet valve to the tub has detached or broken: for example, after transport or maintenance the fill tube may not have been correctly pressed into the fill port, and water flows directly into the base pan instead of the tub — the tub water level switch never detects any water.
- The air hose from the water level pressure switch to the sump is completely disconnected (pulled off or chewed through by rodents); as the tub water level rises, air pressure cannot reach the switch, and the switch remains in the “empty” state.
- The inlet valve drive relay or drive transistor on the main control board has completely failed and cannot supply power to the water inlet solenoid valve.
Self-Check Steps
- First step: check the water supply shutoff valve. Locate the dishwasher water supply shutoff valve under the kitchen sink (typically connected to the dishwasher via a 3/8” or braided stainless steel hose) and confirm the handle is fully open (parallel to the pipe). If there has been recent plumbing work in the area, it is highly likely the valve was closed for the work and forgotten open afterward.
- Confirm that the household water supply is active and that the kitchen faucet cold water flows normally. If a hot water supply connection was used (in some installation scenarios), confirm the water heater is operating normally.
- Close the shutoff valve, unscrew the dishwasher-end connector of the inlet hose, and inspect the stainless steel mesh intake screen at the inlet valve port: if the screen is completely plugged with sediment or rust, clean it and reinstall.
- Reconnect the hose, open the shutoff valve, power-cycle the dishwasher, and start a short cycle. During the fill phase, place your ear close to the door panel or side panel and listen carefully: there should normally be a distinct hissing fill sound; complete silence indicates the inlet valve is not opening.
- If there is a hissing water-fill sound during the fill phase but the cycle still times out with FTD, water is entering the machine but the control board is not detecting the signal — most likely a flow meter fault or water level pressure switch fault. Newer GE models predominantly use a flow meter; older models use a water level pressure switch.
- If there is complete silence and the shutoff valve has been confirmed open, the lower front panel must be removed and a multimeter used to measure the voltage across the inlet solenoid valve terminals during the fill phase: there should be 120V AC present. If voltage is present but the valve is silent, the valve solenoid coil is burned out and requires replacement. If there is no voltage at all, the fault is in the control board or wiring harness — contact GE after-sales service for diagnosis.