Yamada Water Dispenser Repair – Fixing Heating Issues & Restoring Hot Water Supply
Water dispensers are common in homes and offices, but over time, they may develop heating issues, making them unable to provide hot water. Today, we received a service request to inspect and repair a Yamada 389-21 water dispenser. The customer reported that the hot water function was not working, which caused inconvenience in daily use.
1️⃣ On-Site Inspection – Confirming the Heating Failure
To diagnose the issue, we dispensed a small cup of hot water and measured the temperature using an infrared thermometer. The reading was only 28.9°C, which is the same as room temperature, indicating that the heating element was not functioning.
🚨 Possible Causes of the Heating Failure:
✔ Faulty Heating Element – A damaged heating element cannot generate heat.
✔ Defective Thermal Cutoff (Thermostat) – A faulty overheat protection device prevents the heating system from activating.
✔ Burnt or Disconnected Power Wires – Aged or short-circuited wires can interrupt power to the heating system.
Yamada饮水机维修 – 解决无法加热问题，恢复热水供应
饮水机不加热的常见原因
饮水机是家庭和办公室常见的设备，长期使用后，可能会出现无法加热的问题。今天，我们接到客户的维修请求，需要检查并修复Yamada 389-21饮水机，客户反馈热水无法加热，导致无法正常使用。
1️⃣ 现场检查 – 确认饮水机加热故障
我们首先取一小杯热水，并使用温度枪进行测量。测得水温仅28.9°C，与常温没有区别，说明加热管未工作。
🚨 可能导致饮水机无法加热的原因： ✔ 加热管损坏 – 加热元件烧坏无法提供热量
✔ 限温器故障 – 过热保护器损坏，无法启动加热
✔ 电源线路损坏 – 电线老化或短路，导致加热系统断电
2️⃣ Disassembling & Inspection – Burnt Thermostart & Power Wires Found
We removed the water filter and opened the back panel to inspect the internal heating system. After a detailed examination, we found the following problems:
🛑 Burnt Thermostart – The resistance reading was 37.1Ω, which indicates that it had deteriorated, causing unstable electrical flow.
🛑 Burnt Power Wire – The yellow power wire was scorched due to electrical arcing, which required immediate replacement.
💡 What is the function of the Thermostart?
The thermal cutoff (or thermostat) is a crucial safety component that prevents the heating element from overheating. If it fails, the water dispenser may stop heating or function abnormally.
2️⃣ 拆机检查 – 发现限温器和电源线烧焦
我们先卸下滤芯，然后打开后盖，对内部加热系统进行详细检查，发现了以下问题：
🛑 限温器烧坏 – 组织电阻值 37.1Ω，已经老化，影响电流稳定性。
🛑 电源线烧焦 – 黄色电源线出现打火烧糊现象，需要更换。
💡 限温器的作用：
限温器是饮水机的重要保护装置，防止加热管温度过高，一旦损坏，饮水机可能无法加热或加热异常。
3️⃣ Repair Process – Replacing the Thermal Cutoff & Rewiring
🔧 Step 1: Replacing the Burnt Power Wire
✅ Removed the burnt yellow power wire to prevent short circuits.
✅ Installed a new high-temperature-resistant power wire and soldered the connections securely to ensure stable electrical flow.
3️⃣ 维修过程 – 更换限温器 & 重新接线
✅ 步骤 1：更换电源线
- 取下烧焦的黄色电源线
- 重新接一条耐高温电源线，并使用焊锡加固，确保接触良好
🔧 Step 2: Installing New Thermal Cutoff
✅ Removed the two damaged thermal cutoffs that were preventing the heating function from working.
✅ Installed brand new thermal cutoffs to restore proper heating circuit functionality.
✅ Applied thermal grease to the bottom of the thermal cutoff before installation, ensuring optimal heat transfer and tight contact with the stainless steel heating tank.
✅ 步骤 2：更换限温器
- 拆除原来的两颗损坏限温器
- 更换全新限温器，确保加热电路恢复正常
- 在安装前，必须在限温器底部涂抹导热硅胶，确保与不锈钢加热桶紧密贴合，提高导热效率
4️⃣ Testing & Final Assembly – Heating Restored Successfully!
After completing the repairs, we reassembled the water dispenser, plugged in the power, Amp is 2.74A and activated the heating function. Using an infrared thermometer, we conducted a final temperature check:
🌡 The water temperature rose to 77.3°C, confirming that the heating element was working properly again!
✅ Hot water supply restored!
✅ Water dispenser heating system fully functional!
4️⃣ 测试 & 复原 – 恢复正常加热功能
所有部件安装完毕后，我们插上电源，钳形电流表测得电流为2.74A，加热功能工作，并使用温度枪检测：
🌡 水温上升至 77.3°C，加热管已恢复工作，饮水机加热功能修复成功！
💡 Maintenance Tips: Extend the Lifespan of Your Water Dispenser
To prevent heating failures, we recommend the following maintenance practices:
🔹 Regularly inspect power wires for signs of burning or wear.
🔹 Check and replace the thermal cutoff if heating performance declines.
🔹 Clean the internal heating tank to prevent limescale buildup, which can reduce heating efficiency.
🔹 Ensure all electrical connections are secure to avoid power interruptions.
Need Water Dispenser Repair? Contact Us Today!
If your water dispenser is not heating, not producing hot water, heating too slowly, or has a faulty thermal cutoff, we offer professional water dispenser repair services to restore your device to optimal performance! 🚰🔥
📍 Services We Provide:
✅ Water dispenser heating repair
✅ Thermostart replacement
✅ Power wire repair
✅ Regular maintenance & cleaning
📞 Contact us now for expert water dispenser repair solutions!
💡 建议：定期维护，延长饮水机寿命
为了避免饮水机加热故障，建议定期检查电源线路、限温器，并清洁内部水垢，以保证加热效率和安全性。
如果您的饮水机无法加热、没有热水、加热慢、限温器损坏，欢迎联系我们，我们提供专业饮水机维修服务，让您的设备恢复最佳状态！🚰🔥