1. Product Overview
This manual provides detailed instructions for the installation and maintenance of the HZB-12A/25BF ZLWB-12 Household Small Bullet Ice Maker Water Pump. This pump is designed as a direct replacement part to restore the water circulation function in compatible ice maker machines, ensuring efficient ice production.
The pump is a crucial component for the proper operation of your ice maker, facilitating water transfer for the ice-making process. It features a self-priming function to ensure quick and efficient water pumping.

Figure 1: HZB-12A/25BF ZLWB-12 Water Pump
This image displays the HZB-12A/25BF ZLWB-12 Household Small Bullet Ice Maker Water Pump, showing its compact white plastic body, black electrical wires, and connector. The label on the pump indicates its model number and electrical specifications.
2. Safety Information
- Disconnect Power: Always ensure the ice maker is unplugged from the power source before attempting any installation, maintenance, or repair.
- Electrical Safety: This pump operates on DC 12V. Do not use an AC power source. Incorrect voltage can damage the pump and the ice maker, and pose a safety hazard.
- Professional Installation: If you are unsure about any step of the installation process, it is recommended to seek assistance from a qualified technician.
- Water Usage: This water pump is designed for use within the ice maker's internal water circulation system and is not suitable for continuous submersion in water or external water pumping applications.
- Component Handling: Handle all components with care to avoid damage.
3. Product Components
The package typically includes the following:
- 1 x HZB-12A/25BF ZLWB-12 Water Pump

Figure 2: Water Pump and its features
This image provides a detailed view of the water pump, highlighting its various parts including the water inlet/outlet, mounting points, electrical connector, and the main pump body. It also shows the pump in relation to water droplets, emphasizing its function.
4. Specifications
| Feature | Value |
|---|---|
| Model Number | HZB-12A/25BF ZLWB-12 |
| Voltage | DC 12V |
| Current | 0.30A |
| Wattage | 3.6 watts |
| Package Dimensions | 2.48 x 2.44 x 2.4 inches |
| Item Weight | 1.76 ounces |

Figure 3: Water Pump with Dimensions
This image illustrates the physical dimensions of the HZB-12A/25BF ZLWB-12 water pump, including its height, width, and the total length of its connecting wire, which is 16.29 inches.
5. Compatibility
This water pump is compatible with various household small bullet ice maker machines. Please verify your ice maker's model number against the list below to ensure compatibility:
- HZB-13F
- HZB-20F
- HZB-20FA
- HZB-25BF
- HZB-50
- HZB-50A
- HZB-60
- HZB-80

Figure 4: Compatible Ice Maker Models
This image visually confirms the compatibility of the water pump with a range of ice maker models, displaying a list of model numbers alongside an illustration of a typical bullet ice maker.
6. Installation Instructions
Replacing the water pump requires careful handling of internal components. Follow these steps precisely:
- Prepare the Ice Maker: Unplug the ice maker from the power outlet. Ensure it is completely drained of water.
- Access the Pump: Carefully open the ice maker's casing to expose the internal components, including the existing water pump. This may involve removing screws or clips.
- Disconnect Old Pump: Disconnect the electrical cable from the old pump and detach any water hoses connected to it. Note the orientation and connections for reassembly.
- Remove Old Pump: Unscrew or unclip the old water pump from its mounting position and carefully remove it.
- Install New Pump: Place the new HZB-12A/25BF ZLWB-12 water pump into the designated mounting area.
- Secure New Pump: Fix the new pump in place using the original screws or mounting hardware. Ensure it is stable and securely fastened.
- Reconnect Hoses: Reconnect the water hoses to the new pump, ensuring a snug fit to prevent leaks.
- Reconnect Electrical Cable: Plug the electrical cable back into the new pump's connector. Ensure the connection is firm.
- Organize Water Pipe: Carefully organize any water pipes or hoses to ensure they are not kinked or obstructing other components.
- Close Casing: Carefully close the ice maker's casing, ensuring all screws or clips are re-secured.
- Test Operation: Plug the ice maker back into the power outlet and test its operation. The pump should begin to circulate water, and the ice maker should resume normal ice production.

Figure 5: Visual Guide to Water Pump Installation
This multi-panel image provides a visual guide to the installation process of the water pump within an ice maker. It shows the pump itself, its placement inside the machine, and the process of securing it with screws and connecting the wiring.
Video 1: HZB-12A/25BF ZLWB-12 Small Bullet Ice Maker Water Pump Installation Guide
This video demonstrates the step-by-step process of replacing the water pump in a compatible ice maker. It shows how to remove the old pump, install the new one, secure it with screws, and reconnect the necessary cables and hoses, providing a clear visual aid for the installation instructions.
7. Operating Instructions (After Pump Replacement)
Once the new water pump is successfully installed, your ice maker should function as intended. Follow your ice maker's original operating instructions for normal use:
- Fill Water Reservoir: Ensure the ice maker's water reservoir is filled with clean, potable water to the recommended level.
- Power On: Plug the ice maker into a suitable electrical outlet.
- Start Ice Production: Press the power button or select the ice-making cycle on your machine. The new pump will automatically prime and begin circulating water for ice production.
- Monitor: Observe the first few ice-making cycles to ensure proper water flow and ice cube formation.
8. Maintenance
Regular maintenance of your ice maker, including the water pump, will ensure its longevity and efficient operation:
- Regular Cleaning: Clean the ice maker's water reservoir and internal components regularly according to your ice maker's manual to prevent mineral buildup and mold.
- Water Quality: Use filtered water to minimize mineral deposits that can affect pump performance and ice quality.
- Inspect Hoses: Periodically check water hoses for kinks, cracks, or blockages.
- Pump Inspection: If you notice reduced water flow or unusual noises, inspect the pump for any visible obstructions or wear. Always disconnect power before inspection.
9. Troubleshooting
If you encounter issues after replacing the pump, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump not running | Loose electrical connection; No power to ice maker; Faulty pump (unlikely if new) | Check all electrical connections; Ensure ice maker is plugged in and power is on; Contact support if pump is new and not functioning. |
| No water flow | Water reservoir empty; Kinked or blocked hose; Airlock in pump (self-priming should prevent this) | Refill water reservoir; Check and clear hoses; Cycle power to ice maker to re-prime pump. |
| Unusual noise from pump | Debris in pump; Improper installation/mounting | Disconnect power and inspect pump for debris; Ensure pump is securely mounted and not vibrating against other components. |
10. Warranty and Support
For any questions regarding the HZB-12A/25BF ZLWB-12 water pump, including installation assistance or troubleshooting, please contact KOLEOLL customer support. We are committed to providing excellent pre-sales and after-sales service.
- Contact Information: Please refer to the contact details provided with your purchase or visit the official KOLEOLL Store on Amazon.
- Response Time: KOLEOLL aims to respond to inquiries within 24 hours on working days.
Note: Specific warranty details may vary. Please retain your proof of purchase for warranty claims.





