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Bosch HMB402 - User Manual

Bosch HMB402
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Household Appliances
Built-in Microwave Oven
Use and Care Manual
For Models: HMB402, HMB405, HMB406
PLEASE READ ENTIRE INSTRUCTIONS BEFORE PROCEEDING
IMPORTANT: Save these instructions for the local electrical inspector’s use.
INSTALLER: Please leave these Installation Instructions with this unit for the owner.
OWNER: Please retain these instructions for future reference.

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Questions and Answers

  • C
    Corey HorneAug 14, 2025
    Why my Bosch HMB402 Microwave Oven does not start?
    • D
      Daniel HarrisAug 14, 2025
      If your Bosch Microwave Oven isn't starting, first ensure it's receiving power. Check that the door is fully closed and that you've set the cooking time.
  • J
    jillloweAug 17, 2025
    What to do if my Bosch Microwave Oven is sparking?
    • M
      Maria ReedAug 17, 2025
      If you notice sparks inside your Bosch Microwave Oven, it's likely due to using metallic ware or ceramic ware trimmed in gold or silver powder. Do not use metallic ware for cooking except where noted in the cooking guide. Also, avoid using any type of cookware with metallic trimming.
  • T
    Tanner ArnoldAug 20, 2025
    Why is my Bosch HMB402 Microwave Oven output power too low?
    • C
      craig57Aug 20, 2025
      There are a couple of reasons why your Bosch Microwave Oven's output power might be too low. One reason could be low AC input voltage, so use the microwave oven at adequate line voltage. Also, it may not be a defect; it is possible that the food should be cooked for a longer time period.
  • V
    vgibsonAug 23, 2025
    How to fix unevenly cooked foods in my Bosch HMB402?
    • V
      Victoria FrostAug 23, 2025
      If your Bosch Microwave Oven cooks food unevenly, confirm that you're using approved cookware and that the glass turntable is properly positioned inside. Remember to turn or stir the food during cooking. Ensure foods are fully defrosted beforehand, and that the correct time and cooking power level are selected.
  • P
    Paul ShawAug 27, 2025
    Why is my Bosch HMB402 Microwave Oven arcing or sparking?
    • A
      apriljacksonAug 27, 2025
      If you notice arcing or sparking inside your Bosch Microwave Oven, make sure you're using microwave-safe cookware. Also, avoid operating the oven when it's empty.
  • Y
    ybuchananAug 31, 2025
    What causes overcooked food in my Bosch Microwave Oven?
    • S
      Steve WolfAug 31, 2025
      If your Bosch Microwave Oven is overcooking food, double-check that the cooking time and power level are appropriate for what you're preparing.
  • D
    duncanluisSep 3, 2025
    How to improve defrosting in my Bosch HMB402 Microwave Oven?
    • B
      Brian FisherSep 3, 2025
      If your Bosch Microwave Oven isn't defrosting food properly, verify that you're using microwave-safe cookware. Ensure the defrosting time and power level are correct, and remember to turn or stir the food during the defrosting cycle.
  • R
    Richard BarrettSep 6, 2025
    What to do if I am inserting many plugs into one outlet and using them at the same time with my Bosch Microwave Oven?
    • O
      oliverchristineSep 6, 2025
      Avoid using other electrical appliances when you use the Bosch microwave oven.
  • S
    Stephanie NewmanSep 9, 2025
    What to do if my Bosch Microwave Oven is not cooking food properly?
    • F
      Felicia PetersonSep 9, 2025
      If your foods are consistently undercooked in your Bosch Microwave Oven, verify that you are using microwave-safe cookware and that the foods were fully defrosted before cooking. Also, ensure the cooking time and power level are correct, and that the ventilation ports are not blocked.

Summary

Microwave Registration

Microwave Identification Plate

Record essential model and serial number information from the plate for warranty and service purposes.

Microwave Safety

Precautions to Avoid Possible Exposure to Excessive Microwave Energy

Crucial warnings to prevent harmful exposure to microwave energy by ensuring door closure and safety interlocks.

Microwave Safety Instructions

Guidelines for safe operation of the glass tray and roller ring, and general safety precautions.

Important Safety Instructions

General Microwave Use

Essential safety guidelines for proper and safe usage of the microwave oven during cooking.

General Appliance Safety

Precautions for safe operation, installation, and maintenance of the appliance, including child safety.

Control Panel Quick Reference

SMART SENSOR

Automatic cooking based on food type and weight, offering ten food categories for optimal results.

Cooking in the Microwave Oven

Cookware Guide and Cooking Tips

Utensils Recommended for Microwave

List of safe cookware materials such as glass, ceramic, and microwave-safe paper products for oven use.

Not Recommended for Microwave Oven

Identification of materials and utensils that should not be used in the microwave to prevent damage or arcing.

Tips for Cooking in the Microwave

Practical advice for arranging food, covering, stirring, and allowing standing time for optimal results.

Using Your Microwave Oven

Timed Cooking

Procedure for manually setting specific cooking times and power levels for up to 99 minutes.

Power Level Recommendations

Chart detailing 10 power levels and their recommended uses for cooking, reheating, and defrosting various foods.

Smart Sensor Recommendations

Guide to using the Smart Sensor feature for automatic cooking, covering various food categories and amounts.

Defrosting

Auto Defrost

Automated defrosting system with prompts to check and turn food, setting time and power levels automatically.

Cooking Tips

Meat

Cooking recommendations and techniques for various types of meat, including standing times and power levels.

Poultry

Guidelines for preparing and cooking poultry, emphasizing defrosting, piercing, and standing time for even cooking.

Fish

Instructions for cooking fish, including arrangement, covering, and specific cooking times with butter and lemon.

Trouble Shooting

Questions and Answers

Common operational issues and their solutions presented in an easy-to-understand question and answer format.

Before Calling for Service

Troubleshooting steps to resolve common oven problems before contacting service personnel.

Warranty

What Is Covered

Details of the warranty coverage, including repair or replacement of defective parts within one year of installation.

How to Obtain Service

Contact information for authorized service, parts, and customer support for assistance with the appliance.

Bosch HMB402 Specifications

General IconGeneral
ColorStainless Steel
TypeMicrowave
Oven Capacity1.4 cu. ft.
Capacity1.4 cu. ft.
Cooking Programs6 automatic programs

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