Introduction
Thank you for choosing the Mayer MMAO20 20L Air Fryer Oven. This appliance combines the functions of an air fryer, oven, and steamer, offering versatile cooking options. To ensure safe and efficient operation, please read this manual thoroughly before first use and retain it for future reference.
Important Safety Instructions
When using electrical appliances, basic safety precautions should always be followed to reduce the risk of fire, electric shock, and injury to persons.
- Read all instructions before using the appliance.
- Do not touch hot surfaces. Use handles or knobs.
- To protect against electric shock, do not immerse cord, plugs, or the appliance in water or other liquid.
- Close supervision is necessary when any appliance is used by or near children.
- Unplug from outlet when not in use and before cleaning. Allow to cool before putting on or taking off parts.
- Do not operate any appliance with a damaged cord or plug, or after the appliance malfunctions or has been damaged in any manner.
- The use of accessory attachments not recommended by the appliance manufacturer may cause injuries.
- Do not use outdoors.
- Do not let cord hang over edge of table or counter, or touch hot surfaces.
- Do not place on or near a hot gas or electric burner, or in a heated oven.
- Extreme caution must be used when moving an appliance containing hot oil or other hot liquids.
- To disconnect, turn any control to 'off', then remove plug from wall outlet.
- Do not use appliance for other than intended use.
- Ensure adequate ventilation around the appliance during operation.
- Always ensure the water tank is correctly inserted when using steam functions.
Product Overview
Familiarize yourself with the components of your Mayer MMAO20 Air Fryer Oven.

Figure 1: Front view of the Mayer MMAO20 Air Fryer Oven, showcasing the control panel, door handle, and overall design. The oven features a white body with red accents and a clear glass door.

Figure 2: Interior view of the Mayer MMAO20 Air Fryer Oven, showing the multiple rack positions, air fry basket, and baking pan. The interior is designed for efficient heat distribution.
Components:
- Oven Body: Main housing of the appliance.
- Glass Door: Transparent door for viewing cooking progress.
- Control Panel: Touch controls and a rotary knob for settings.
- Detachable Water Tank: For steam baking functions.
- Heating Elements: Hidden dual stainless steel elements (top and bottom).
- Convection Fan: For even heat distribution during air frying and convection baking.
- Oven Light: Illuminates the interior.
- Accessories: Includes air fry basket, baking pan, and oven rack.
Setup
Unpacking and Placement:
- Carefully remove the oven and all accessories from the packaging.
- Remove any packaging materials, stickers, or protective films from the appliance.
- Place the oven on a stable, level, heat-resistant surface. Ensure there is at least 10-15 cm of clear space on all sides and above the oven for proper ventilation.
- Do not place the oven near flammable materials or heat sources.
Before First Use:
- Wash all removable accessories (air fry basket, baking pan, oven rack) in warm, soapy water. Rinse thoroughly and dry completely.
- Wipe the interior and exterior of the oven with a damp cloth.
- To eliminate any manufacturing odors, plug in the oven and run it empty for approximately 15-20 minutes at 200°C (390°F) in a well-ventilated area. A slight odor or smoke may be present; this is normal.
- Allow the oven to cool completely before using it for cooking.
Operating Instructions
Control Panel Overview:
The Mayer MMAO20 features a touch control panel and a central 'Select' rotary knob for easy operation.
- Power Button: Turns the oven on/off.
- Function/Mode Buttons: Selects cooking modes or preset functions.
- Temperature/Time Buttons: Adjusts temperature and cooking time.
- Select Knob: Rotates to adjust values (temperature, time, preset selection) and presses to confirm.
Basic Operation:
- Plug the oven into a grounded electrical outlet. The display will illuminate.
- Press the Power button to turn on the oven.
- Select your desired cooking function or preset.
- Adjust temperature and time using the dedicated buttons or the Select knob.
- Press the Select knob or Start button (if available) to begin cooking.
Using Preset Functions:
The oven comes with 12 preset functions for common dishes. Refer to the display for specific preset names.
- Turn on the oven.
- Rotate the Select knob to browse through the available preset functions.
- Once the desired preset is highlighted, press the Select knob to confirm. The oven will display the default temperature and time for that preset.
- You may adjust the temperature and time if needed using the respective buttons or the Select knob.
- Press the Select knob again to start cooking.
DIY Mode:
For custom cooking, use the DIY mode to manually set temperature and time.
- Turn on the oven.
- Select the DIY mode (refer to your control panel for the specific button/icon).
- Use the Temperature buttons or rotate the Select knob to set the desired temperature. Press the Select knob to confirm.
- Use the Time buttons or rotate the Select knob to set the desired cooking time. Press the Select knob to confirm.
- Press the Select knob again to start cooking.
Steam Baking:
The detachable water tank allows for steam-assisted cooking.
- Pull out the detachable water tank located on the side of the oven.
- Fill the tank with distilled or filtered water up to the MAX fill line. Do not overfill.
- Carefully reinsert the water tank into its slot until it clicks into place.
- Select a cooking function that utilizes steam (e.g., certain baking presets or a custom DIY setting with steam).
- Ensure the water tank is full before starting a steam function. Refill as needed for longer cooking times.
Using Accessories:
- Air Fry Basket: Ideal for air frying foods like fries, chicken wings, and vegetables. Place on the upper rack position for best results.
- Baking Pan: Use for baking cakes, cookies, or roasting smaller items. Place on the middle or lower rack.
- Oven Rack: Suitable for general baking, toasting, or placing heat-safe dishes.
- Always ensure accessories are properly seated in the oven before closing the door and starting operation.
Cleaning and Maintenance
Regular cleaning ensures optimal performance and extends the life of your appliance.
General Cleaning:
- Always unplug the oven from the power outlet and allow it to cool completely before cleaning.
- Wipe the exterior of the oven with a soft, damp cloth. Do not use abrasive cleaners or scouring pads.
- For the interior, wipe down with a damp cloth and mild detergent. For stubborn stains, a non-abrasive oven cleaner designed for non-stick surfaces can be used, following the product instructions.
- Clean the glass door with a glass cleaner or a damp cloth.
- Ensure all surfaces are dry before plugging the oven back in.
Cleaning Accessories:
- The air fry basket, baking pan, and oven rack can be washed in warm, soapy water. For baked-on food, soak them before cleaning.
- Rinse thoroughly and dry completely before storing or reusing.
Water Tank Maintenance:
- Empty any remaining water from the tank after each use.
- Clean the water tank regularly with a mild detergent and rinse thoroughly.
- If using tap water, descaling may be required periodically to remove mineral buildup. Consult the manufacturer's website or customer support for descaling instructions.
Troubleshooting
If you encounter any issues with your Mayer MMAO20 Air Fryer Oven, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Oven does not turn on. | Not plugged in; power outage; faulty outlet. | Ensure the power cord is securely plugged into a working outlet. Check your circuit breaker. |
| Food is not cooking evenly. | Overcrowding; incorrect temperature/time; improper rack position. | Do not overcrowd the oven. Adjust temperature/time as needed. Use the recommended rack position for the cooking function. Flip or stir food halfway through cooking. |
| Steam function not working. | Water tank empty or not inserted correctly; mineral buildup. | Ensure the water tank is filled with water and securely inserted. Descale the oven if mineral buildup is suspected. |
| Excessive smoke during cooking. | Food with high fat content; food residue in oven. | Reduce fat content or use less oil. Clean the oven interior and accessories thoroughly after each use. |
If the problem persists after trying these solutions, please contact Mayer customer support.
Specifications
Technical specifications for the Mayer MMAO20 Air Fryer Oven.
| Feature | Specification |
|---|---|
| Brand | Mayer |
| Model | MMAO20 |
| Capacity | 20 litres |
| Wattage | 1250 watts |
| Control Type | Touch |
| Power Source | Electric |
| Special Features | 12 Preset Functions, Steam Baking, Dual Heating Elements, Convection Fan, Oven Light |
| Finish Type | Brushed |
| Colour | Multicolor (Red & White) |
Warranty and Support
For warranty information, product registration, or technical support, please refer to the warranty card included with your purchase or visit the official Mayer website. Keep your proof of purchase for any warranty claims.


