1. Important Safeguards
Please read all instructions before using this appliance. Failure to follow these instructions may result in product damage or personal injury. Keep this manual for future reference.
- Do not immerse the appliance, cord, or plug in water or other liquids.
- 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, and before cleaning the appliance.
- Do not operate any appliance with a damaged cord or plug, or after the appliance malfunctions or has been damaged in any manner.
- Use only attachments recommended by the manufacturer.
- Do not place on or near a hot gas or electric burner, or in a heated oven.
- Do not use outdoors.
- Do not use appliance for other than intended use.
2. Product Overview
The BUNN MCU My Cafe Single Cup Multi-Use Coffee Brewer is designed for versatility, allowing you to brew single-serve coffee, ground coffee, tea bags, loose tea, and dispense hot water. It features an internal stainless steel hot water tank for optimal brewing temperature.

Front view of the BUNN MCU My Cafe Single Cup Multi-Use Coffee Brewer.
Included Components:
- K-Cup® drawer (for single-serve pods)
- Loose grounds drawer (for ground coffee or loose tea)
- Soft pod/tea bag drawer (for soft coffee pods or tea bags)
- Hot water drawer (for dispensing hot water)

The BUNN MCU brewer with the K-Cup® drawer inserted.

The BUNN MCU brewer with the loose grounds drawer inserted.

The BUNN MCU brewer with the soft pod/tea bag drawer inserted.

The BUNN MCU brewer with the hot water drawer inserted.
3. Setup and First Use
Initial Cleaning:
- Remove all packaging materials and labels from the brewer.
- Wash all removable parts (drawers, drip tray if included) in warm, soapy water. Rinse thoroughly and dry.
- Wipe the exterior of the brewer with a damp cloth.
Priming the Brewer:
Before first use, the brewer must be primed to fill the internal hot water tank.
- Place the brewer on a flat, stable surface.
- Ensure the hot water drawer is inserted into the brew head.
- Place a large mug or container under the dispenser.
- Open the lid of the water reservoir.
- Pour at least 14 ounces of fresh, cold water into the reservoir. The water level indicator in the pour-in bowl will show the amount added.
- Close the reservoir lid. The brewer will begin to heat the water.
- Once the water is heated (indicated by the 'brew' light turning solid green), press the 'brew' button. Hot water will dispense.
- Discard the hot water. The brewer is now primed and ready for use.

Top view of the BUNN MCU, illustrating the water reservoir.
4. Operating Instructions
The BUNN MCU offers four different brewing configurations. Always ensure the correct drawer is used for your desired beverage.
General Brewing Steps:
- Ensure the brewer is plugged in and the 'brew' light is solid green, indicating the water is at optimal temperature.
- Select the appropriate drawer for your beverage type.
- Prepare the drawer with your coffee or tea.
- Insert the prepared drawer into the brew head.
- Place your cup or travel mug (up to 14 oz) on the drip tray.
- Open the water reservoir lid and pour the desired amount of fresh, cold water (4 to 14 ounces) into the reservoir.
- Close the reservoir lid. The brewing process will begin automatically.
- For a bolder flavor, press the 'pulse' button during brewing.
- Once brewing is complete, carefully remove your cup.
Specific Drawer Usage:
- K-Cup® Drawer: Insert a K-Cup® pack into the drawer. Close the drawer and insert into the brewer.
- Loose Grounds Drawer: Add your desired amount of ground coffee or loose tea into the filter basket within the drawer. Do not overfill. Close the drawer and insert into the brewer.
- Soft Pod/Tea Bag Drawer: Place a soft coffee pod or tea bag into the drawer. Close the drawer and insert into the brewer.
- Hot Water Drawer: Insert the empty hot water drawer into the brewer. Pour water into the reservoir to dispense hot water for other uses.
Official video demonstrating the features and operation of the BUNN MCU My Cafe Single Cup Multi-Use Coffee Brewer.
5. Maintenance and Cleaning
Regular cleaning and maintenance will ensure optimal performance and longevity of your BUNN MCU brewer.
Daily Cleaning:
- Unplug the brewer before cleaning.
- Remove and empty the used coffee/tea from the drawer.
- Wash all removable drawers and the drip tray (if applicable) in warm, soapy water. Rinse thoroughly.
- Wipe down the exterior of the brewer with a damp, soft cloth. Do not use abrasive cleaners.
Descaling (Every 3 Months or as needed):
Mineral deposits can build up over time, affecting performance. Descaling helps remove these deposits.
- Ensure the brewer is unplugged and cooled.
- Fill the water reservoir with a solution of equal parts white vinegar and water.
- Place a large mug under the dispenser.
- Plug in the brewer and allow the solution to heat.
- Press the 'brew' button to run a full cycle of the vinegar solution through the machine.
- Repeat the process with fresh water several times to rinse out any remaining vinegar taste.
6. Troubleshooting
If you encounter issues with your BUNN MCU brewer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Brewer starts running unexpectedly. | Internal sensor malfunction or electrical issue. | Immediately unplug the brewer. Contact customer service. Always keep a cup under the dispenser. |
| Loud operation, dripping, or spitting water. | Mineral buildup, clogged sprayhead, or internal component issue. | Perform descaling. Ensure drawers are clean and properly seated. If problem persists, contact customer service. |
| Brew button flashes, brewing does not start. | Water in the internal tank is not at optimal temperature. | Wait for the 'brew' light to turn solid green. Press the 'brew' button again. |
| Coffee/tea spills outside the cup during brewing. | Cup not positioned correctly, or issue with the brew head/drawer. | Ensure cup is centered. Check that the drawer is fully inserted and not obstructed. |
| Loose grounds drawer parts detach easily. | Wear and tear on the drawer components. | Handle with care during cleaning. If parts are broken, contact customer service for replacements. |
For issues not listed here, or if troubleshooting steps do not resolve the problem, please contact BUNN Customer Service.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Bunn |
| Model Name | MCU |
| Model Number | 42900.05 |
| Capacity | 14 fluid ounces |
| Color | Black/SST |
| Product Dimensions (D x W x H) | 10.1"D x 7.2"W x 12.1"H |
| Material | Plastic, Stainless Steel |
| Power Source | AC adapter |
| Voltage | 120V |
| Wattage | 1400W |
| Operation Mode | Fully Automatic |
| Coffee Input Type | Ground coffee, K-Cup® pods, Soft coffee pods, Tea bags, Loose tea |
| Filter Type | Reusable |
8. Warranty and Support
Warranty Information:
The BUNN MCU My Cafe Single Cup Multi-Use Coffee Brewer comes with a 2-Year Manufacturer's Warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact BUNN Customer Service. Our team is located in Springfield, IL, USA, and is available to assist you via phone or email.
Refer to the official BUNN website or your product packaging for the most current contact information.






