Introduction
Thank you for choosing the Bosch Series 2 BEL623MS3 Built-in Microwave. This appliance combines microwave functionality with a grill, offering versatile cooking options. This manual provides essential information for the safe and efficient use of your microwave, including installation, operation, maintenance, and troubleshooting.

Front view of the Bosch Series 2 BEL623MS3 Built-in Microwave, showcasing its sleek design and control panel.
Safety Information
Please read all safety instructions carefully before using the appliance to prevent personal injury or damage. Keep this manual for future reference.
- Ensure the microwave is properly grounded.
- Do not operate the microwave if the door is damaged or if the seals are worn.
- Only use microwave-safe cookware. Metal containers are not suitable for microwave mode.
- Never heat sealed containers or baby bottles with narrow necks, as they may explode.
- Supervise children when the appliance is in use.
- Do not attempt to service or repair the appliance yourself. Contact qualified service personnel.
Setup and Installation
The Bosch BEL623MS3 is designed for built-in installation. Proper installation is crucial for safety and performance. Refer to the dimension diagram and the installation video for detailed guidance.
Installation Dimensions

Detailed diagram showing the required dimensions in millimeters for built-in installation of the microwave. Key dimensions include 595mm width, 382mm height, and 335mm depth for the appliance, with specific cabinet opening requirements.
Component Placement
Before first use, ensure all internal components are correctly placed:
- Place the glass turntable securely on its support.
- For grill functions, position the metal grill rack on the turntable.

Interior view of the microwave showing the glass turntable and the metal grill rack placed inside.
Installation and Use Video
Watch this video for a visual guide on installing and setting up your Bosch microwave, including placing internal accessories.
This video demonstrates the installation process of the Bosch BEL623MS3 microwave and how to correctly place its internal components like the turntable and grill rack.
Operating Instructions
Your Bosch microwave offers various functions for heating, cooking, and grilling. The LED display and control knob facilitate easy operation.

The microwave with its door open, revealing the interior and the control panel on the right.
Basic Microwave Function
- Place food in a microwave-safe container on the turntable.
- Close the microwave door.
- Use the control knob to set the desired cooking time.
- Select the power level (e.g., 800W, 600W) using the dedicated buttons.
- Press the 'Start +30 sec' button to begin cooking.
Grill Function
For optimal grilling results, use the provided grill rack. The grill function is ideal for browning and crisping food.
- Place food on the grill rack.
- Close the microwave door.
- Select the grill function (refer to the specific symbol on the control panel).
- Set the desired grilling time.
- Press 'Start'.
Gourmet Recipes
The microwave features up to 8 pre-programmed gourmet recipes. Simply select the food type and weight, and the microwave will automatically adjust cooking settings for optimal results.
- Press the 'star' button to access pre-programmed recipes.
- Use the control knob to select the desired recipe.
- Enter the weight of the food if prompted.
- Press 'Start'.
Defrost Function
The defrost function allows for quick and even thawing of food.
- Place frozen food in a microwave-safe container.
- Press the 'kg' button to activate the weight-based defrost function.
- Use the control knob to set the weight of the food.
- Press 'Start'.
Operating the Control Panel Video
This video demonstrates how to use the control panel for various functions, including setting time and power levels.
A demonstration of the microwave's control panel, showing how to set time, power, and use other functions.
Maintenance and Cleaning
Regular cleaning ensures the longevity and hygiene of your microwave.
- Interior Cleaning: Wipe the interior with a damp cloth and mild detergent after each use. For stubborn stains, place a bowl of water with lemon juice inside and microwave for a few minutes to loosen residue.
- Exterior Cleaning: Clean the exterior surfaces with a soft, damp cloth. Avoid abrasive cleaners or harsh chemicals.
- Turntable and Rack: The glass turntable and metal grill rack can be removed and washed with warm soapy water or in a dishwasher.
- Door Seals: Regularly check and clean the door seals to ensure they are free from food debris and remain intact.
Troubleshooting
If you encounter issues with your microwave, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Microwave does not start | Door not closed properly; Power outage; Fuse blown. | Ensure door is fully closed; Check power supply; Reset circuit breaker. |
| Food not heating evenly | Incorrect power level or cooking time; Food not stirred/rotated. | Adjust settings; Stir or rotate food halfway through cooking. |
| Unusual noises during operation | Turntable not correctly seated; Foreign object inside. | Re-seat turntable; Check for and remove any obstructions. |
| Display shows an error code | Internal malfunction. | Refer to the full user manual or contact Bosch customer service. |
If the problem persists after attempting these solutions, please contact Bosch customer support for assistance.
Specifications
Here are the key technical specifications for the Bosch Series 2 BEL623MS3 Built-in Microwave:
- Brand: Bosch
- Model Number: BEL623MS3
- Installation Type: Built-in
- Color: Black and Steel
- Capacity: 20 Liters
- Wattage: 800 watts
- Voltage: 230 Volts
- Product Dimensions (D x W x H): 33.5 x 59.5 x 38.2 cm
- Weight: 14.3 kg
- Material: Stainless Steel
- Special Features: Defrost, Grill, LED Display, Gourmet Recipes
- Included Components: 1 x Microwave, 1 x Turntable, 1 x Grill Rack
Warranty and Support
Your Bosch BEL623MS3 microwave comes with a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions. For technical support, spare parts, or service inquiries, please visit the official Bosch website or contact their customer service department.
Bosch Customer Service: www.bosch-home.com