1. Introduction
The Breville BMO850BSS Smooth Wave Countertop Microwave Oven is designed for efficient and precise cooking, reheating, and defrosting. Featuring Sensor iQ technology and a Power Smoothing Inverter, this appliance aims to simplify your kitchen tasks with intelligent presets and quiet operation. This manual provides essential information for safe and effective use of your microwave oven.

Figure 1: Breville BMO850BSS Smooth Wave Countertop Microwave Oven in Brushed Stainless Steel.
2. Safety Instructions
Always follow basic safety precautions when using electrical appliances. Read all instructions before use. Do not operate the microwave oven if the door or door seals are damaged. Do not heat liquids or other foods in sealed containers as they are liable to explode. Never operate the oven empty. Ensure proper ventilation around the unit. This appliance is for residential use only.
Child Lock Feature
The Breville Smooth Wave Microwave includes a Child Lock feature to prevent unintended operation. This one-touch security feature helps keep your kitchen secure and protects children from accessing hot food or operating the microwave. Refer to the 'Operating Instructions' section for details on activating and deactivating the Child Lock.
3. Setup
Placement
Place the microwave oven on a stable, level surface that is strong enough to hold the oven and the food being heated. Ensure there is adequate space for ventilation around the unit. Do not block air vents. Maintain a minimum clearance of 8 inches on all sides and top for proper airflow.

Figure 2: Product dimensions for proper placement and ventilation.
Power Connection
Plug the microwave oven into a grounded 120 Volt (AC) electrical outlet. Ensure the outlet is easily accessible. Do not use extension cords or adapters.
4. Features
- Sensor iQ Technology: Automatically adjusts power to precisely cook or reheat food. The Smart Reheat feature detects steam released and automatically sets the specific time for optimal results.
- Power Smoothing Inverter: This technology automatically adjusts power intensity, delivering smooth, even power for consistent cooking. This is ideal for reheating pizza, soup, and lasagna, and for defrosting meats without overheating the edges.
- 15 In-built Smart Presets: Includes Smart Cook, Smart Reheat, and Smart Defrost settings for various food types, providing precise temperature control and even heating.
- Quiet Microwave with Soft Close Door: Engineered with an 80% quieter soft close door and 50% quieter operation.
- Shortcuts and One Touch Auto Settings: A shortcuts panel on the inside door provides quick access to common tasks such as melting chocolate, softening butter, or reheating pizza.
- A Bit More Button: Press the 'A Bit More' button to add extra cooking time without starting a new cycle.
- Breville Sound Suite and Mute Button: Allows for less beeps and clangs, offering a quieter kitchen experience.

Figure 3: Sensor iQ technology detects steam for precise cooking.

Figure 4: Power Smoothing Inverter ensures smooth, even heating.

Figure 5: Display showing various Smart Cook presets like Popcorn, Potatoes, and Vegetables.

Figure 6: The microwave door features a soft-close mechanism for quieter operation.
5. Operating Instructions
Basic Operation
- Place food in a microwave-safe container on the turntable.
- Close the door gently.
- Use the 'TIME/Food Type' dial to select the desired cooking time or food type from the presets.
- Adjust the power level using the 'POWER/Amount' dial if not using a smart preset.
- Press the 'START/Instant +30' button to begin cooking.
Using Smart Presets (Cook, Reheat, Defrost)
The microwave features dedicated buttons for Smart Cook, Smart Defrost, and Smart Reheat. Select the desired function, then use the 'TIME/Food Type' dial to choose the specific food item or weight/quantity. The Sensor iQ technology will automatically adjust settings for optimal results.
'A Bit More' Function
If your food requires a little more cooking time after a cycle completes, simply press the 'A Bit More' button to add a short burst of additional cooking time without reprogramming.
Mute Function
To silence the microwave's beeps and alerts, locate the 'Mute' button on the control panel and press it. This is part of the Breville Sound Suite for a quieter operation.
Child Lock Activation/Deactivation
To activate or deactivate the Child Lock, refer to the specific instructions on the inside of the microwave door or the full user manual. This feature typically involves pressing and holding a specific button combination for a few seconds.
Official Product Videos
Video 1: The Smooth Wave - A smarter, smoother, quieter microwave. This video highlights the advanced features and quiet operation of the Breville Smooth Wave microwave.
Video 2: The Smooth Wave - Cook, defrost and reheat with one touch. This video demonstrates the ease of use for cooking, defrosting, and reheating with the microwave's one-touch functions.
6. Maintenance and Cleaning
Interior Cleaning
Clean the interior of the microwave regularly with a soft, damp cloth and mild detergent. For stubborn food splatters, place a bowl of water with lemon slices inside and microwave for a few minutes to create steam, then wipe clean. Ensure the microwave is unplugged before cleaning.
Exterior Cleaning
Wipe the exterior surfaces with a soft, damp cloth. Avoid abrasive cleaners or scouring pads that could scratch the brushed stainless steel finish.
Turntable Care
The glass turntable and roller ring can be removed for cleaning. Wash them in warm, soapy water or in the dishwasher. Ensure they are completely dry before placing them back in the microwave.
7. Troubleshooting
- Microwave not starting: Check if the power cord is securely plugged into a working outlet. Ensure the door is fully closed. Verify that the Child Lock is not activated.
- Food not heating evenly: Ensure food is placed centrally on the turntable. Stir or rotate food halfway through cooking if possible. Use microwave-safe dishes.
- Unusual noises during operation: Check if the turntable and roller ring are correctly positioned. Ensure no foreign objects are inside the microwave cavity.
- Display not working: Unplug the microwave for a few minutes, then plug it back in to reset the system. If the issue persists, contact customer support.
8. Specifications
| Specification | Value |
|---|---|
| Product Dimensions | 19 x 20.43 x 12.44 inches |
| Item Weight | 34.2 pounds |
| Manufacturer | Breville |
| Item Model Number | BMO850BSS |
| Capacity | 1.2 Cubic Feet / 34 Liters |
| Voltage | 120 Volts (AC) |
| Wattage | 1250 watts |
| Color | Brushed Stainless Steel |
| Material | Stainless Steel |
| Special Feature | Child Safety Lock |
9. Warranty and Support
Warranty Information
This Breville BMO850BSS Smooth Wave Countertop Microwave Oven comes with a 1 Year Limited Product Warranty. Please retain your proof of purchase for warranty claims.
Customer Support
For further assistance, troubleshooting, or warranty inquiries, please visit the official Breville website or contact their customer support line. Contact details can typically be found in the original packaging or on the manufacturer's website.





