🔧 Balboa BP501G2 Spa Circuit Board — 56965-01 / G1352 (BP501 Series, Circ Pump Required, All TP Topsides)

Genuine OEM replacement board for Balboa BP501G2 systems — the dedicated circ-pump-enabled control board for two-pump hot tubs.

⚡ Product Overview

The Balboa BP501G2 circuit board (part number 56965-01, catalog reference G1352) is a genuine OEM main PCB for the Balboa BP501G2 control system — the specific variant of the BP501 platform engineered to run a 2-speed Pump 1 alongside a dedicated circulation pump. This is the critical distinction that sets the G2 apart from other BP501 variants: a circulation pump is required for this board to operate correctly, and in return it unlocks the ability to run a 2-speed primary jet pump in the same system.

The BP501G2 board controls the full suite of spa equipment: a 2-speed primary jet pump (or 1-speed when paired with a 24-hour circ setup), a secondary 1-speed pump or blower, a circ pump for continuous filtration, a 5.5kW heater, ozone generator, 12V spa light, and audio. It is compatible with all TP-series topside panels, giving installers and technicians maximum flexibility during replacement or upgrade.

Used as original equipment in spas from Cal Spas, Marquis Spas, Master Spas, Coast Spas, Bullfrog Spas, Clearwater Spas, Vita Spas, Catalina Spas, and more, the 56965-01 is a widely used board across the industry. Ships factory-new from Parts4Tubs, covered under the Balboa Water Group manufacturer’s warranty.

🌟 Key Features

✅ Circ Pump Enabled — 2-Speed Pump 1 Supported — The defining G2 feature: allows a 2-speed primary jet pump to run alongside a dedicated circulation pump in the same system. Other BP501 variants cannot combine these two simultaneously.

✅ Circ Pump Required — This board is specifically designed for spas equipped with a circulation pump. If your spa does not have a circ pump, see the BP501G3 (56961-01) instead.

✅ 5.5kW Heater Output — Full 5.5kW at 240V, with Balboa’s proven M7-era BP heater architecture using Plug & Click heater connections.

✅ 2-Speed Primary Pump (Pump 1) — Pump 1 supports 2-speed operation at up to 12A max; drops to 1-speed configuration when a 24-hour circ pump mode is selected.

✅ Secondary 1-Speed Pump or Blower (Pump 2) — 1-speed output at up to 12A max for a secondary jet pump or air blower.

✅ Dedicated Circulation Pump Output — Circ pump connector supports up to 2A max; handles programmable filtration cycles and continuous polling for water quality and temperature.

✅ Ozone Generator Output — Slaved to the circ pump circuit; voltage must match the circ pump and Pump 1 configuration.

✅ 12V Spa Light — Dedicated light output (12V, 12W).

✅ All TP Topside Compatible — Works with the full range of Balboa TP-series topsides (TP200T, TP200W, TP400T, TP400W, TP500, TP600, TP700, TP740, TP800, TP900) and spaTouch panels.

✅ Broad OEM Brand Coverage — Genuine original-equipment board used in hot tubs from Cal Spas, Marquis Spas, Master Spas, Coast Spas, Bullfrog Spas, Clearwater Spas, Vita Spas, Catalina Spas, and others.

✅ Genuine Balboa Water Group OEM Board — Factory-built and tested; non-returnable policy ensures every board ships pristine and uninstalled.

📊 Technical Specifications

Specification	Value
Part Number	56965-01
Catalog Reference	G1352
Chip Number	BP501G2R2A
Board Type	Main PCB — complete replacement control board
Series	BP501 Generation 2 (G2)
Input Voltage	240V AC / 60Hz (primary); 120V available in select configurations
Service Type	4-wire (Hot-Black, Hot-Red, Neutral-White, Ground) for 240V
Circuit Breaker Rating	50A maximum (240V service)
GFCI Requirement	AC Class A GFCI protected circuit required (per NEC Article 680)
Heater Output	5.5kW at 240V
Pump 1	2-Speed (or 1-Speed in 24-hour circ mode) — 12A max
Pump 2 / Blower	1-Speed — 12A max
Circ Pump	Required — 2A max; programmable filtration + polling
Ozone Output	Slaved to circ pump — voltage must match circ pump and Pump 1
Light Output	12V, 12W
Topside Connection	4-pin Molex connector — all TP-series and spaTouch panels
Circ Pump Required	⚠️ YES — system will not operate correctly without a circ pump
Warranty	Balboa Water Group manufacturer’s warranty — contact Parts4Tubs for details
Return Policy	Non-returnable — verify compatibility before ordering

⚠️ CIRC PUMP WARNING: This board requires a functioning circulation pump. If your current spa does not have a circ pump, this is not the correct board. See the BP501G3 (56961-01) for non-circ-pump configurations, or consider the BP7 Control System as a complete system upgrade that works with all TP topsides.

ℹ️ US VOLTAGE NOTE: The BP501G2 is primarily a 240V AC / 60Hz board on a 4-wire service. 120V configurations are available in select setups but require specific wiring changes. Verify your spa’s electrical service before ordering.

🔄 Compatibility Guide

This board is the main PCB for:

System	Notes
Balboa BP501G2	Direct OEM main board replacement
Balboa BP501 System Pack 56480	Standard G2 system with Incoloy heater
Balboa BP501 System Pack 56482	G2 system with Titanium heater
Balboa BP501 System Pack 56486	G2 system with 825 Incoloy heater

Compatible Topside Panels (All TP Series):

Series	Models
TP200 Series	TP200T, TP200W
TP400 Series	TP400T US, TP400W US
TP500 Series	TP500 (any version)
TP600 Series	TP600 (version 2.7 and later)
TP700 / TP740	Any version
TP800 Series	Any version
TP900 Series	Any version
spaTouch™	Any version (spaTouch 1, 2, Icon, Menued)

OEM Spa Brands Using This Board:

Brand	Notes
Cal Spas	Used as original equipment
Marquis Spas	Used as original equipment
Master Spas	Used as original equipment
Coast Spas	Used as original equipment
Bullfrog Spas	Used as original equipment
Clearwater Spas	Used as original equipment
Vita Spas	Used as original equipment
Catalina Spas	Used as original equipment
Platinum Spas by Superior Wellness	Used as original equipment

Replaces / Cross-Reference Part Numbers:

Part Number	Source / Description
56965-01	Balboa — current revision designation
56965	Balboa — earlier version
G1352	Balboa internal catalog reference
BP501G2R2A	Chip number (white label, center of board)

Universal Replacement Option:

Part Number	Description
59375	Balboa BP501 Universal Circuit Board — replaces BP501-G1, G2, and G3

⚠️ BP501G2 vs. BP501G3 — Critical Distinction:

• BP501G2 (56965-01): Circ pump required; supports 2-speed Pump 1 alongside circ pump
• BP501G3 (56961-01): No circ pump; supports 2-speed Pump 1 without a circ pump
• Ordering the wrong variant will result in a system that does not function correctly

⚠️ Always identify your board by the chip number on the white label near the center of the PCB before ordering.

🎛️ Board Functions & Controls

Pump Outputs:

Output	Function	Rating
Pump 1	Primary jet pump — 2-Speed	12A max
Pump 2 / Blower	Secondary jet pump or air blower — 1-Speed	12A max
Circ Pump	24-hour circulation — continuous filtration and polling	2A max

Heater Control:

Feature	Specification
Heater Output	5.5kW at 240V
Heater Connection	Plug & Click style
Temperature Range (Hi)	80°F – 104°F (set range); default 100°F
Temperature Range (Lo)	50°F – 99°F (set range); default 70°F
Freeze Protection	44°F threshold — rotating pump activation at lowest speed

Additional Outputs:

Function	Specification
Ozone	Slaved to circ pump — 0.5A max
Spa Light	12V / 12W
AV / Audio	240V AV output

Circ Pump Configuration Notes:

The circ pump can be programmed in several operational modes, including programmable filtration + polling cycles, 24-hour operation with a 3°F temperature shut-off, or acting like a Pump 1 Low speed. Ozone is slaved to run with the heater pump (circ pump in G2 configurations). Both the circ pump, Pump 1, and the ozone generator must be wired to the same voltage.

⚙️ Installation Requirements

⚠️ IMPORTANT: Installation must be carried out by a licensed electrician in compliance with NEC (National Electrical Code) and local codes.

Pre-Installation Checklist:

• [ ] Confirm chip number BP501G2R2A on your existing board’s white label
• [ ] Verify your spa has a functional circulation pump — this board will NOT work without one
• [ ] Disconnect all power at the breaker and disconnect box before beginning
• [ ] Photograph all existing wiring connections before removal
• [ ] Allow capacitors to discharge — wait at least 5 minutes after power-off
• [ ] Note your existing DIP switch positions before removing the old board
• [ ] Verify the voltage settings of your circ pump, Pump 1, and ozone generator — all three must be the same voltage

Electrical Requirements:

Requirement	Specification
Supply Voltage	240V AC / 60Hz (primary)
Service Type	4-wire (hot, hot, neutral, ground)
Circuit Breaker	50A maximum (240V)
GFCI Protection	AC Class A GFCI required (per NEC Article 680)
Ground Connection	Mandatory — equipment grounding + bonding per NEC Article 680
Dedicated Circuit	Required
Disconnect Box	Required within line of sight of spa (per NEC)
Wire Gauge	#6 AWG minimum, 90°C rated

Key Wiring Notes:

Note	Detail
Circ pump, Pump 1, and Ozone voltage	All three must be wired to the same voltage — mismatching voltages will cause component damage
Circ pump minimum flow	23 GPM through the heater is required for correct operation
TB1 torque	27–30 in. lbs. (terminal block supply connections)
Heater connections torque	30–35 in. lbs.
Wire type	Copper conductors only

💡 Tip: If you are unsure whether your replacement board should be a G2 (circ pump) or G3 (no circ pump), look for a circ pump plumbed into the spa pack. If a small circulation pump (typically 1/15 HP or similar) is connected to the heater plumbing independently of the jet pumps, your system requires the BP501G2.

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⚠️ Safety Warnings

Electrical Safety:

• ⚠️ ALWAYS disconnect power at the breaker and disconnect box before any work on the spa pack
• ⚠️ Installation by a licensed electrician only
• ⚠️ This board requires 240V AC / 60Hz on a 4-wire service — verify your electrical supply before connecting
• ⚠️ AC Class A GFCI protection is required by NEC Article 680 for all spa installations
• ⚠️ Never operate the spa with covers removed from electrical components
• ⚠️ All wiring must comply with NEC and applicable local electrical codes
• ⚠️ Use copper conductors only — #6 AWG minimum, rated 90°C

Critical Voltage Matching Warning:

• ⚠️ Circ pump, Pump 1, and ozone generator must all be wired to the same voltage. Mismatching these will damage components and void the warranty.

Circ Pump Requirement Warning:

• ⚠️ Do NOT install this board in a spa that does not have a circulation pump. The system will not function correctly without one — install the BP501G3 (56961-01) instead, or consider the BP7 system as a complete upgrade.

Water & Electrical Safety:

• ⚠️ Ensure no water ingress into the control box during or after installation
• ⚠️ Check all seals and gaskets during installation
• ⚠️ Never handle electrical components with wet hands

Post-Installation:

• ⚠️ Verify the circ pump achieves minimum 23 GPM flow through the heater before extended operation
• ⚠️ Test all safety features — particularly hi-limit sensor — before returning the spa to service
• ⚠️ Check for error codes on initial startup and resolve before use

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🔍 Troubleshooting

Common Issues After Board Replacement:

Symptom	Likely Cause	Action
Heater not running, “FLO” or flow error	Circ pump not connected, not running, or flow below minimum	Verify circ pump wiring, prime the system, and confirm minimum 23 GPM through heater
Breaker trips on startup	Voltage mismatch or wiring error	Check that circ pump, Pump 1, and ozone are all wired to the same voltage; verify 4-wire 240V supply
Pump 1 runs only on low speed	System configured for 1-speed P1 (24-hour circ mode)	Check software setup selection via test mode on the topside panel
Pump 2 / blower unresponsive	DIP switch or software setup mismatch	Verify setup selection and DIP switch positions match your hardware configuration
Ozone not operating	Voltage mismatch or slaving not configured	Confirm ozone is wired to the same voltage as circ pump and Pump 1
System installed, no display	Topside panel connection issue	Check 4-pin Molex connector seating at main board

⚠️ Refer to your spa’s original wiring diagram and the Balboa BP501G2 tech sheet before adjusting DIP switches or setup numbers. Contact Parts4Tubs for technical support if needed.

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Balboa BP501G2 systems with circ pump	✅ Direct OEM replacement	Exact chip match required — verify BP501G2R2A on existing board
♨️ Hot tubs with 2-speed Pump 1 + circ pump configuration	✅ Purpose-built for this	Only BP501 variant supporting this combination
♨️ Spas using TP-series topsides	✅ Full compatibility	All TP200 through TP900 and spaTouch variants supported
♨️ Cal Spas, Marquis, Master, Coast, Bullfrog, Clearwater, Vita, Catalina	✅ OEM equivalent	Used as original equipment across these brands
♨️ Technicians upgrading from BP501G1 (circ pump setups)	✅ Correct upgrade path	G2 is the proper board when circ pump + 2-speed P1 are both present

This board is NOT suitable for:

• Spas without a circulation pump — use BP501G3 (56961-01) or BP501 Universal (59375) instead
• Systems requiring a 2-speed Pump 2 — the BP7 or BP501 Universal offer expanded pump configurations

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❓ Frequently Asked Questions

Q: How do I confirm this is the right board for my spa? A: Find the chip number on the white label near the center of your existing board. It must read BP501G2R2A. You can also check your spa pack’s exterior label for a system model number referencing BP501G2. Never order by appearance alone — BP501 G1, G2, and G3 boards can look very similar.

Q: What happens if I install this board in a spa without a circ pump? A: The system will not function correctly. The BP501G2 requires a circ pump to complete its heater and filtration circuits. Install the BP501G3 (56961-01) for non-circ-pump spas, or use the universal BP501 board (59375) pre-configured for your setup.

Q: How is the BP501G2 different from the BP501G3? A: The G2 requires a circulation pump and supports a 2-speed Pump 1 alongside the circ pump. The G3 does not use a circ pump and runs a 2-speed Pump 1 as the sole heater pump. Using the wrong variant for your plumbing configuration will cause operational failures.

Q: Can the BP7 control system replace my BP501G2? A: Yes. The Balboa BP7 Control System is the recommended full-system replacement if your BP501G2-based spa pack is beyond repair. It works with all TP topsides and provides a modern alternative. Contact Parts4Tubs for guidance on which BP7 kit is right for your spa.

Q: Do all TP topside panels work with this board? A: Yes — the BP501G2 is compatible with the full range of TP topsides from TP200 through TP900, as well as all spaTouch panels. Some setup numbers limit available button functions; consult the BP501 tech sheet for your specific panel layout.

Q: What is the circ pump voltage requirement? A: The circ pump, Pump 1, and ozone generator must all be wired to the same voltage. This is a critical wiring requirement — mismatching will cause component damage.

Q: Can I return this board if it’s incorrect? A: Circuit boards are non-returnable. Please verify your chip number (BP501G2R2A) and confirm your spa has a circ pump before ordering. Our team is happy to help you confirm the correct board before purchase.

Q: What warranty does this board carry? A: The 56965-01 is covered under the Balboa Water Group manufacturer’s warranty. Contact Parts4Tubs for full terms.

📥 Downloads & Resources

📄 Balboa BP501 Universal Tech Sheet (BP501UX) — Current Balboa BP501 platform tech sheet with full wiring diagrams, DIP switch definitions, and setup tables (applicable reference for BP501 series)

✅ Why Choose the Balboa BP501G2 Board (56965-01 / G1352)

✅ The Only BP501 Board Supporting 2-Speed Pump 1 + Circ Pump — Specifically engineered for this combination; no workarounds or compromises

✅ Genuine Balboa Water Group OEM Board — Manufactured by Balboa, the original designer of the BP501 platform

✅ 5.5kW Heater at 240V — Full heating power for demanding spa configurations

✅ All TP Topsides Supported — From the compact TP200 to the full-featured TP900 and spaTouch

✅ Wide OEM Brand Coverage — Original equipment in spas from Cal Spas, Marquis, Master Spas, Coast Spas, Bullfrog, Clearwater, Vita Spas, Catalina, and more

✅ Factory-New, Never Installed — Non-returnable policy ensures a pristine board every time

✅ Manufacturer’s Warranty Covered — Full Balboa Water Group warranty support through Parts4Tubs

🤝 Why Buy From Parts4Tubs

✅ Fast US shipping on in-stock parts

✅ Expert technical advice from spa specialists who know BP-series systems

✅ Competitive pricing on genuine OEM boards

✅ Full warranty support — we help you navigate manufacturer claims

✅ Easy returns within 30 days on eligible items (circuit boards are non-returnable per manufacturer policy)

✅ Compatible BP7 systems, TP topsides, heaters, and accessories available

✅ Help identifying whether you need BP501G2 vs G3 vs the BP7 upgrade

 

💡 Summary

The Balboa BP501G2 circuit board (56965-01 / G1352, chip BP501G2R2A) is the purpose-built main PCB for BP501G2 spa control systems — the only BP501 variant designed to run a 2-speed Pump 1 alongside a dedicated circulation pump. A circ pump is required; without one, this board will not function correctly. Running on 240V / 60Hz with a 50A circuit, it controls Pump 1 (2-speed), Pump 2 or blower (1-speed), circ pump, a 5.5kW heater, ozone, and 12V lighting — compatible with all TP-series topsides. Used as OEM equipment across Cal Spas, Marquis, Master Spas, Coast Spas, Bullfrog, Clearwater, Vita Spas, and Catalina Spas. Verify your chip number before ordering — circuit boards are non-returnable. Order from Parts4Tubs for fast US shipping and expert support.

Finding and identifying a replacement Hot Tub Circuit Board (PCB)

If you are looking to replace a failed PCB on your Hot Tub’s spa pack, then quite often identifying the part that you need can be the hardest thing.

Firstly, you are looking for a model number on the actual circuit board itself. Having the model or serial of your hot tub is not going to help at this point, you need to find the number on the PCB itself.

Now, with certain brands of PCB, the number of the replacement PCB that you need is not going to match identically the one you are replacing. Why is that I hear you ask?

Well, normally, it is an updated version. This means that it might have updated firmware on the PCB or be a later revision. Normally, this means that the part number would be slightly different. This is usually indicated with a “12345678 -x” at the end of that part number where x indicated a firmware revision.

In some cases, there will be some following letters on the part number of the circuit board, “12345678 -x MAS” this can indicate that the PCB was used for an OEM meaning it was produced for a certain hot tub manufacturer and the letters identify the manufacturer.

This means if you source an original PCB, it will not have the letters, but will in most cases work just fine.

It can be confusing I know!

What if you can’t find a model number?

If you can’t find a model number on the PCB itself, then you need to look for a model number on the spa pack. Normally, there is a sticker on the outside of the spa pack that tells you the current ratings and input voltages etc and this will have a model number.

In general, most spa packs in the USA are manufactured by Balboa, Hydro-Quip, ACC or Gecko. I know I am generalising here, but if you have a spa pack that has the brand of your hot tub on, it will be an OEM so the key is identifying who made the original box.

From there, you can normally find an original PCB that you will be able to switch out.

For example, the Balboa VS (value series) is a very popular spa pack that has been used by multiple hot tub manufacturers under their own brand names. Whatever they have called it, strip it back and it is still a Balboa VS.

Visual Inspection

One of the most important things you can do when you are looking for a replacement is to visually inspect the PCB that you have versus the picture online of the replacement you are considering. They need to look the same even if there are the differences in firmware revisions or OEM part numbers, you should be visually replacing a PCB that looks like the one you have.

Configuring a replacement Hot Tub Circuit Board (PCB)

When you get a new PCB, you are more than likely going to need to configure it. Most PCBs have a number of different modes and setups that the can operate in. For this, you will need to manual or spec sheet to guide you.

For things like DIP switches, most of the time you can copy the settings from your original circuit board. You are looking for things like setting the voltage as a lot of PCBs can be configured to run on both 115V and 230V.

You may need to move jumpers or even wires to configure voltages – the key here is that you read the schematic and don’t expect the PCB to just work out of the box – it usually doesn’t.

Troubleshooting a Hot Tub Circuit Board (PCB)

Here are some common things you will see when you replace a PCB on a hot tub.

You press the buttons on the topside control and they don’t control the right parts (pumps or blower etc) – this is a mode configuration thing and you will either need to change some DIP switches on the PCB or an internal or low level programming mode on the topside control. Check the manual for how to do this.

You turn on the hot tub and it trips the breaker – it is not common for a new PCB to fail out of the box (I have not seen one yet!) However, a common mistake is that the voltage has not been set correctly. If it is set for 115V and then you try and turn it on, the current draw will be a lot more (twice) than expected and the breaker will trip.

To check this, unplug all of your kit – heater, pumps, blower and then turn on the PCB. If it trips with nothing plugged in, usually the voltage is incorrectly set and what is happening is that live current is being sent to the ground – because you have 4 wires into the PCB rather than 3. Current on the ground loop causes the trip. Check the settings to make sure it is configures for 230V.

It might not trip until you physically turn on a pump or a blower. As mentioned, if the pack is set to 115V and your pump is meant for 230V, it will draw twice the current at half the voltage and trip your breaker. Check the manual for info on how to set the voltage.