How to Use Your Japanese Water Heater Remote

Summary:
Your unit likely has a wall-mounted remote panel that controls the water heater (especially for bath & shower) and sometimes the heater for the whole home. This guide helps you understand the buttons, operate the unit safely, and indicates when to contact maintenance.
Based on information from guides like FUN! JAPAN. FUN! JAPAN+1

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🔍 1. Identify the Panel & Its Basic Controls

Before using the remote, locate the panel.

• Often mounted on a wall in the kitchen, bathroom or near the water heater unit.

• You’ll see buttons with Japanese labels such as 運転 (unten), おいだき (oidaki), 給湯 (kyūtō), 自動 (jidō). FUN! JAPAN+1

• Note the battery compartment if applicable — some panels are powered by batteries and can stop working when batteries run low.

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🛠 2. How to Operate the Remote

Here’s a step-by-step of common operations:

Power On / Off

• Press 運転 / 停止 (unten / teishi) to turn the unit on or off. FUN! JAPAN

• On “On”, display lights up and controller becomes active.

Adjusting Water Temperature (for Shower/Tap)

• Look for the button labelled 給湯 (kyūtō) or temperature arrows.

• Press the up/down arrows to raise or lower the water supply temperature.

• You may see a display showing e.g., “40°C”.

Bath Mode / Auto Fill

• To fill your bath: press ふろ自動 (furo jidō) or similar. The system will fill to a preset level and temperature automatically. FUN! JAPAN

• To re-heat already filled bath water: press おいだき (oidaki). This is common when you reuse bath water. FUN! JAPAN

Other Buttons You Might Find

• たし湯 (tashiyu) = add hot water to bathtub.

• たし水 (tashimizu) = add cold water if the bath is too hot.

• 優先 (yūsen) = priority mode (makes this panel control the hot-water system, overriding other panels). Japan Living Guide

• 予約 (yoyaku) = timer/reservation function to start your bath at a set time.

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🎯 3. Safety Tips & Best Practices

• Always ensure the unit has power and batteries are working (if remote uses batteries).

• Make sure the gas or hot-water system is enabled (check main gas valve or water heater power).

• Do not leave children unsupervised in baths when using auto-fill or reheat functions.

• If you smell gas, or display shows error (e.g., blinking lights), turn off and contact maintenance immediately.

• After using the bath auto‐fill, turn off the unit if you’re leaving for extended time to save energy.

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📞 4. When to Contact Maintenance

If you have followed the steps and:

• No hot water flows at all

• Error codes or blinking lights remain after reset

• The unit fails to auto-fill or reheat

• If the steps did not work please submit a maintenance request.