1. Product Overview
The Northern Lights Group Balboa BP501G1 Replacement Spa Circuit Board (PN G1351) is designed as a direct replacement for the main board in BP501G1 spa packs. This board is the latest BP5X version and comes pre-configured with a factory default setup (#01). Proper installation requires careful adjustment of dip switches and white receptacle voltage select jumpers to match the settings of your original spa circuit board.

Figure 1: Angled view of the BP501G1 Replacement Spa Circuit Board, showing various components and wiring.
2. Key Features
- Direct replacement for Balboa BP501G1 Spa Pack Main Board.
- Replaces Part Number (PN): 56944-01.
- Latest BP5X version of the circuit board.
- Manufactured in the USA.
3. Setup and Installation
Important: Installation should only be performed by a qualified technician. Ensure all power to the spa is disconnected before beginning installation to prevent electrical shock or damage to the unit.
- Power Disconnection: Turn off the main power supply to the spa at the circuit breaker. Verify that no power is reaching the spa pack.
- Access Original Board: Carefully open the spa pack enclosure to access the existing circuit board. Note the orientation and connections of all wires. Taking photographs of the existing setup is highly recommended.
- Remove Original Board: Disconnect all wires and mounting hardware from the old circuit board.
- Transfer Settings: The new BP501G1 board comes with a factory default setup (#01). It is critical to adjust the dip switches and white receptacle voltage select jumpers on the new board to exactly match the settings of your original board. Refer to your original spa pack's manual or the old board for these specific configurations. Incorrect settings can lead to improper operation or damage.
- Install New Board: Mount the new BP501G1 circuit board securely in the spa pack enclosure.
- Reconnect Wiring: Reconnect all wires to their corresponding terminals on the new board, ensuring a secure and correct connection for each. Refer to your photographs and the spa pack's wiring diagram.
- Close Enclosure: Securely close the spa pack enclosure.
- Power Restoration: Restore power to the spa at the circuit breaker.
- Initial Test: Follow your spa's manufacturer instructions for initial power-up and testing to ensure all functions operate correctly.

Figure 2: Top-down view of the BP501G1 Replacement Spa Circuit Board, showing the layout of fuses, relays, and connection terminals.
4. Operating Instructions
Once the BP501G1 circuit board is correctly installed and configured, the spa's operation will be controlled by its existing topside control panel and associated components. This circuit board functions as the central control unit for the spa's various systems (heater, pumps, blower, lights, etc.). Refer to your specific spa model's user manual for detailed instructions on operating your spa's features and settings.
Ensure that all safety features, such as high-limit sensors and pressure switches, are functioning correctly after installation.
5. Maintenance
The BP501G1 circuit board itself requires minimal maintenance. However, regular inspection of the spa pack and its components is recommended:
- Visual Inspection: Periodically check the circuit board for any signs of corrosion, burnt components, or loose connections.
- Enclosure Integrity: Ensure the spa pack enclosure remains sealed and free from moisture, insects, and debris.
- Ventilation: Verify that the spa pack area has adequate ventilation to prevent overheating.
- Fuse Checks: If a component fails, check the corresponding fuse on the circuit board. Always replace fuses with the exact same type and rating.
For any cleaning, ensure power is disconnected and use a soft, dry brush or compressed air to remove dust. Do not use liquids or harsh chemicals.
6. Troubleshooting
If your spa is not functioning correctly after installing the BP501G1 circuit board, consider the following troubleshooting steps:
- No Power: Check the main circuit breaker for the spa. Verify all power connections to the circuit board are secure.
- Incorrect Operation: Double-check all dip switch and jumper settings against your original board's configuration. Even a single incorrect setting can cause malfunctions.
- Component Failure: If a specific component (e.g., pump, heater) is not working, check its individual wiring and the corresponding fuse on the circuit board.
- Error Codes: Refer to your spa's user manual for explanations of any error codes displayed on the topside control panel.
- Professional Assistance: If issues persist, contact a qualified spa technician for diagnosis and repair.
7. Specifications
| Specification | Detail |
|---|---|
| Model | BP501G1 |
| Part Number (PN) | G1351 |
| Replaces PN | 56944-01 |
| Manufacturer | Balboa (Board manufactured by Northern Lights Group) |
| Item Weight | 3 pounds |
| Origin | USA |
8. Warranty Information
This Northern Lights Group Balboa BP501G1 Replacement Spa Circuit Board comes with a 1-year manufacturer warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, misuse, accidents, or unauthorized modifications. Please retain your proof of purchase for warranty claims.
9. Support
For technical assistance, troubleshooting beyond the scope of this manual, or warranty inquiries, please contact Northern Lights Group customer support. When contacting support, please have your product model number (BP501G1), part number (G1351), and proof of purchase readily available.