Introduction
Thank you for choosing the Maestri House Mug Warmer. This electric coffee cup warmer is designed to keep your beverages at a consistent, enjoyable temperature. Featuring three adjustable temperature settings and an automatic shut-off function, it provides convenience and safety for your home or office. Please read this manual carefully before use to ensure proper operation and maintenance.
Safety Information
- The center of the mug warmer is the heating area. The surface temperature is high during operation and may retain heat after use. Please avoid touching it to prevent burns.
- Using a non-flat-bottomed or double-layered cup will affect heating and warming performance. For optimal performance, select a mug with a flat bottom and thin walls to ensure a secure connection to the mug warmer.
- If ceramic cups or plastic cups are used, the heating time and temperature may not reach the expected results.
- Before cleaning, disconnect the power and allow it to cool down. This product should not be exposed to water or cleaned in water. It is recommended to wipe it with a damp cloth.
- Please unplug the power cord or turn it off when during cleaning or not in use.
- Keep the product out of reach of children to avoid burns from high temperatures.
- If the power cord is damaged, it must be replaced by a professional technician to avoid potential hazards. In case of any malfunction, immediately disconnect the power and stop using the product. Please do not attempt to repair it yourself for your own safety.

Product Components
- Mug Warmer Unit
- Heat-Resistant Silicone Pad
- User Manual

Setup
- Unpack the mug warmer and all its components.
- Place the mug warmer on a flat, stable, and heat-resistant surface.
- Plug the power cord into a standard 120V electrical outlet.
- Optionally, place the heat-resistant silicone pad on the heating surface to provide extra grip and protection for your mug.
Operating Instructions
Turning On/Off and Temperature Adjustment
- To turn on the mug warmer, rotate the knob clockwise. The temperature display light will illuminate, starting from the highest temperature setting.
- Continue to turn the knob clockwise to cycle through the three temperature settings. The light color will change to indicate the current temperature:
- Red Light: 149°F (Highest)
- Purple Light: 131°F (Medium)
- Blue Light: 113°F (Lowest)
- Stop turning the knob when the desired temperature light is displayed.
- To turn off the mug warmer, rotate the knob counter-clockwise until the light goes out.

Automatic Shut-Off
For added safety and energy conservation, the mug warmer is equipped with an 8-hour automatic shut-off function. If left on, the device will automatically power off after 8 hours of continuous operation.

Recommended Mug Types
For optimal heating performance, use mugs with a flat bottom and thin walls. Materials such as stainless steel, glass, and ceramic are recommended. Double-layered cups or cups with thick, uneven bottoms may not heat effectively.

Product Video: Maestri House Mug Warmer Overview
Video: An official overview of the Maestri House Mug Warmer, showcasing its features, design, and ease of use for various hot beverages.
Maintenance
Cleaning
The tempered glass heating panel is waterproof and easy to clean. To clean, ensure the device is unplugged and completely cool. Wipe the surface with a damp cloth. Do not immerse the unit in water or use abrasive cleaners.
Storage
When not in use, store the mug warmer in a dry place, away from direct sunlight and extreme temperatures.
Troubleshooting
- Device not turning on: Ensure the power cord is securely plugged into a working outlet. Rotate the knob clockwise to turn on.
- Beverage not heating sufficiently: Check that you are using a flat-bottomed, thin-walled mug. Ensure the mug is centered on the heating panel. Adjust to a higher temperature setting if desired.
- Automatic shut-off too soon: The device has an 8-hour auto shut-off. If it turns off before 8 hours, ensure the knob is not accidentally turned off or that there isn't a power interruption.
Specifications
| Feature | Specification |
|---|---|
| Model Number | MHCW03 |
| Color | Wood Grain |
| Material | Glass |
| Product Dimensions | 4.92"L x 0.98"W x 5.3"H |
| Power Source | Corded Electric |
| Voltage | 120 Volts |
| Wattage | 20 watts |
| Temperature Settings | 113°F (Blue), 131°F (Purple), 149°F (Red) |
| Auto Shut-off | 8 hours |
Warranty & Support
Maestri House provides a 1-year warranty on all products. This warranty is valid and enforceable if you have purchased a new product from Maestri House or from one of our authorized retailers or resellers in a jurisdiction where we sell products. If you have any further questions or concerns, please feel free to contact us at support@maestrihouse.com.


