GASTROBACK 42427
Gastroback 42427 Colour Vision Pro Water Kettle User Manual
Model: 42427 | Brand: GASTROBACK
Introduction
Thank you for choosing the Gastroback 42427 Colour Vision Pro Water Kettle. This appliance combines innovative features with elegant design, offering precise temperature control and a unique optical temperature display. Please read this manual carefully before first use to ensure safe and optimal operation of your new kettle.

The Gastroback 42427 Colour Vision Pro Water Kettle, showcasing its sleek stainless steel design and illuminated water level indicator.
Important Safety Instructions
- Read all instructions before use.
- Do not immerse the kettle, power base, or cord in water or other liquids.
- Ensure the voltage indicated on the appliance corresponds to your local mains voltage.
- Keep the appliance out of reach of children and pets.
- Always unplug the kettle from the power outlet when not in use and before cleaning.
- Do not operate the kettle if the cord or plug is damaged, or if the appliance malfunctions or has been damaged in any way.
- Use the kettle only for heating water.
- Avoid contact with steam escaping from the spout or lid when water is boiling.
- Do not fill above the MAX level indicator to prevent boiling water from overflowing.
- Ensure the lid is securely closed before operating.
Product Overview
Familiarize yourself with the components of your Gastroback Colour Vision Pro Water Kettle.
- 1. Lid: Securely covers the kettle opening.
- 2. Spout: For pouring water.
- 3. Handle: Ergonomically designed for comfortable grip, houses control buttons and digital display.
- 4. Water Level Indicator with Colour Vision: Displays water volume and changes colour according to temperature.
- 5. Power Base: 360° cordless base with cord storage.
- 6. Control Panel: Buttons for temperature selection, purify function, and power.
- 7. Removable Scale Filter: Located inside the spout for cleaner water.

Detailed view of the kettle's handle and electronic control panel, showing the digital temperature display and function buttons.
Setup
- Unpacking: Carefully remove the kettle and all accessories from the packaging. Retain packaging for future storage or transport.
- First Use Cleaning: Before first use, fill the kettle with fresh water to the MAX level, boil it, and then discard the water. Repeat this process two to three times to remove any manufacturing residues.
- Placement: Place the power base on a stable, flat, heat-resistant surface, away from the edge of the countertop. Ensure the cord is not dangling where it can be pulled or tripped over.
- Power Connection: Plug the power cord into a grounded electrical outlet.
Operating Instructions
Filling the Kettle
Open the lid and fill the kettle with the desired amount of fresh water. Do not fill below the MIN (0.5L) mark or above the MAX (1.5L) mark. Close the lid securely before placing the kettle on the power base.
Temperature Selection and Boiling
The kettle offers adjustable temperature settings for various beverages:
- 50°C: Ideal for delicate green teas.
- 60°C: Suitable for white teas.
- 70°C: Perfect for oolong teas.
- 85°C: Recommended for coffee and black teas.
- 100°C: For boiling water, suitable for herbal teas, instant noodles, or sterilizing.
- Place the filled kettle on the power base.
- Press the power button (①) to turn on the kettle.
- Use the temperature selection buttons (↑↓) to choose your desired temperature. The selected temperature will be displayed on the handle's digital screen.
- The kettle will begin heating, and the water level indicator will illuminate, changing colour as the water temperature rises.
- Once the selected temperature is reached, the kettle will automatically switch off.

The Colour Vision feature displays different light colours (blue to red) corresponding to water temperature, from 50°C to 100°C.
Purify Function
The Purify function initiates an extended anti-bacterial boiling cycle (approximately 3 minutes) for particularly pure water.
- Fill the kettle with water.
- Press the Purify button (① with water drop icon) on the handle.
- The kettle will boil the water for an extended period to ensure purification.
Automatic Keep Warm Function
The kettle can keep water at your selected temperature for up to 30 minutes.
- Select your desired temperature as described above.
- After the kettle reaches the set temperature, the keep warm function will automatically activate.
- The digital display will show the current temperature, and the kettle will maintain it for 30 minutes.
Maintenance
Cleaning
- Always unplug the kettle and allow it to cool completely before cleaning.
- Wipe the exterior of the kettle with a soft, damp cloth. Do not use abrasive cleaners or scouring pads.
- The interior can be cleaned with a soft brush or sponge.
- The removable scale filter can be rinsed under running water. If heavily scaled, gently brush it.
- Never immerse the kettle or its power base in water.
Descaling
Regular descaling is essential to maintain the kettle's performance and prolong its lifespan, especially in hard water areas. Descale every 1-3 months depending on water hardness.
- Fill the kettle with a mixture of water and white vinegar (1:2 ratio) or a commercial descaling solution according to product instructions.
- Boil the solution. For heavy scale, let it soak for 30 minutes to an hour, or even overnight.
- Discard the solution and rinse the kettle thoroughly several times with fresh water to remove any residue and vinegar smell.
- Boil fresh water once or twice and discard to ensure all descaling agent is removed before using for beverages.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Kettle does not turn on. | Not plugged in; no power; kettle not properly seated on base. | Check power cord and outlet; ensure kettle is correctly placed on the power base. |
| Water not boiling or reaching desired temperature. | Lid not closed; insufficient water; heavy scale build-up. | Ensure lid is closed; fill water above MIN level; descale the kettle. |
| Kettle switches off too quickly. | Scale build-up; faulty sensor. | Descale the kettle. If problem persists, contact customer support. |
| Water tastes strange or has particles. | New kettle residue; scale particles; filter needs cleaning. | Perform initial cleaning steps; descale the kettle; clean the scale filter. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | 42427 |
| Brand | GASTROBACK |
| Power Output | 2400 W |
| Capacity | 1.5 Litres |
| Product Dimensions | 15 x 22 x 29 cm |
| Item Weight | 1.26 kg |
| Material | Stainless Steel / Plastic |
| Special Features | Adjustable Temperature, Optical Temperature Display, Purify Function, Keep Warm Function, Automatic Cut-off, Removable Scale Filter, 360° Cordless Base |
Warranty and Support
GASTROBACK products are manufactured with high quality standards. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official GASTROBACK website.
Official Website: www.gastroback.de
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