🛠️ Balboa BP501G3 Spa Circuit Board — 56961-01 / G1353 (BP501 Series, No Circ Pump, Dual 2-Speed Pumps, 5.5kW)

Get your hot tub running again with this genuine OEM replacement board — the no-circ-pump BP501 variant for dual 2-speed pump systems.

💧 Product Overview

The Balboa BP501G3 circuit board (part number 56961-01, catalog reference G1353, base PCBA 56585) is the genuine OEM main PCB for the Balboa BP501G3 control system. It is the non-circulation-pump variant of the BP501 family — specifically engineered for hot tubs that rely entirely on their primary jet pump for heating circulation, with no dedicated circ pump in the plumbing.

The G3 is the most versatile BP501 variant in terms of raw pump configurations: across its eight software setups, it supports combinations of up to two 2-speed jet pumps, an optional 1-speed third pump via the Pump 3 output, a blower, ozone, a 12V spa light, and a 120V audio system — all without a circ pump in the loop. A 2-speed Pump 2 requires the X-P332 expander board (PN 55137), which connects via the J108 expansion port.

This board operates on 240V AC / 60Hz as its primary configuration (4-wire service), with a 120V option available in Setup 8 only. It ships in Setup 1 (2-speed Pump 1, 2-speed Pump 2, 1-speed Pump 3, no blower) and requires DIP switch and wiring configuration before use.

The 56961-01 is compatible with all TP-series topside panels (TP400T/W, TP600, TP800) and is used as original equipment across a wide range of spa brands. Ships factory-new and is covered under Balboa Water Group’s manufacturer’s warranty.

⭐ Key Features

✅ No Circ Pump — Pump 1 is the Heater Pump — Purpose-built for spas without a dedicated circulation pump; Pump 1 (2-speed) handles both jet and heating duties. Must deliver 20 GPM through the heater.

✅ ⚠️ No Circ Pump Compatibility — This board will NOT work with a circulation pump. If your spa has a circ pump, use the BP501G2 (56965-01) instead.

✅ Dual 2-Speed Pump Support — Runs a 2-speed Pump 1 natively; a 2-speed Pump 2 is supported via the X-P332 expander board (PN 55137), connected at the J108 expansion port with a 30A fuse.

✅ 5.5kW Heater at 240V — Full-power heating with Plug & Click heater connection; 1.25kW at 120V in Setup 8.

✅ Up to Three Pump Outputs — Pump 1 (2-speed, 10A max), Pump 2 (2-speed via expander / 1-speed in some setups, 10A max), and Pump 3 (1-speed, 10A max) — three independent jet zones in Setups 1 and 3.

✅ Blower Output — 1-speed blower at up to 4A max (Setups 2, 4, and 6); activated via jumper wire change on J20/J13.

✅ Eight Software Setups — Full configuration flexibility from a minimal 1-pump layout (Setup 8) through a three-pump setup (Setups 1 and 3); switchable via the test menu on the topside.

✅ 120V Ozone Output (Slaved to Pump 1 Low) — Ozone runs with Pump 1 low speed; voltage must match Pump 1. Configurable to 240V output.

✅ 10V Spa Light — Dedicated light output up to 1A max, with a 240-minute programmable timer.

✅ 120V Audio / AV Output — 4A always-on stereo/AV terminal.

✅ TP400, TP600, and TP800 Topside Compatible — Works with TP400T (version 2.7+), TP400W, TP600 (version 2.7+), and TP800 (version 3.1+), plus bba™ Bluetooth audio via integrated TP800 support.

✅ Genuine Balboa Water Group OEM Board — Factory-built, tested, and covered under manufacturer’s warranty. Non-returnable policy ensures every board ships pristine.

🔩 Technical Specifications

Specification	Value
Part Number	56961-01
Catalog Reference	G1353
Chip Number	BP501G3R1A
Base PCBA	56585
Board Type	Main PCB — complete replacement control board
Series	BP501 Generation 3 (G3)
UL System Model	BP501-BP501G3-AU
Software Version	20.0
Input Voltage (Primary)	240V AC / 60Hz
Input Voltage (Setup 8 only)	120V or 240V AC / 50–60Hz
Service Type (240V)	4-wire (Hot-Black, Hot-Red, Neutral-White, Ground)
Service Type (120V, Setup 8)	3 or 4 wires
Circuit Breaker (240V)	60A maximum
Circuit Breaker (120V, Setup 8)	20A maximum
GFCI Requirement	AC Class A GFCI protected circuit required
Heater Output	5.5kW at 240V / 1.25kW at 120V (Setup 8 only)
Pump 1	2-Speed — 10A max — heater pump (must deliver 20 GPM through heater)
Pump 2	2-Speed via X-P332 expander (PN 55137) at J108 / 1-Speed in Setups 3, 4, 7 / Unused in Setups 6, 8
Pump 3	1-Speed — 10A max — Setups 1 and 3 only
Blower	1-Speed — 4A max — Setups 2, 4, and 6
Circ Pump	⚠️ NOT SUPPORTED — this board will not work with a circ pump
Ozone Output	240V / 0.5A max — slaved to Pump 1 low speed
Light Output	10V AC / 1A max — 240-minute programmable timer
Audio / AV Output	120V AC / 4A max — always on
Expansion Port	J108 — X-P332 expander board (PN 55137) for 2-speed Pump 2
Wire Gauge	#6 AWG minimum, 90°C rated, copper only
TB1 Torque	27–30 in. lbs.
Heater Connection Torque	30–35 in. lbs.
Heater Connection	Plug & Click style
Temperature Range (Hi)	80°F – 104°F; default 100°F
Temperature Range (Lo)	50°F – 99°F; default 70°F
Freeze Threshold	44°F (rotating pump activation at lowest speed)
Ships In Setup	Setup 1 (2-speed P1, 2-speed P2 via expander, 1-speed P3, no blower)
Warranty	Balboa Water Group manufacturer’s warranty — contact Parts4Tubs for details
Return Policy	Non-returnable — verify compatibility before ordering

⚠️ NO CIRC PUMP: This board will not operate correctly with a circulation pump. For circ-pump systems, order the BP501G2 (56965-01) instead.

ℹ️ US VOLTAGE NOTE: The BP501G3 is primarily a 240V / 60Hz board on a 4-wire service. 120V operation is available in Setup 8 only and requires specific wiring changes. Always verify your spa’s electrical service before ordering.

🔄 Compatibility Guide

This board is the main PCB for the following system packs:

System Pack	Description
56582	BP501G3 — 800 Incoloy heater
56583	BP501G3 — 825 Incoloy heater
56584	BP501G3 — Titanium heater

Compatible Topside Panels:

Panel	Version Requirement
TP400T	Version 2.7 and later
TP400W	Any version (single-pump setups only)
TP600	Version 2.7 and later
TP800	Version 3.1 and later (version 3.13+ for bba™ Bluetooth audio)

Auxiliary Panels (via J5):

Panel	Part Number
AX10A1	52803
AX10A2	52804
AX10A3	52805
AX10A4	52806
AX20 (A1+A2)	52800
AX20 (A1+A3)	52801
AX20 (A1+A4)	52802
AX40	52799

Expander Board Required for 2-Speed Pump 2:

Part Number	Description
55137 (X-P332)	Required for 2-speed Pump 2 — connects at J108, 30A fuse

Replaces / Cross-Reference Part Numbers:

Part Number	Source / Description
56961-01	Balboa — current revision
56961	Balboa — earlier version
56585	Balboa — base PCBA / earlier system variant
56582 / 56583 / 56584	System pack numbers (heater variants)
G1353	Balboa internal catalog reference
BP501G3R1A	Chip number (white label, center of board)
33-56961-K	HydroQuip cross-reference
3-60-0189	Alternate distributor reference
BP501-G3-BP5X	Alternate model designation
MS50UR1C	Master Spas OEM chip reference (replaced by G1353)
59375	Balboa BP501 Universal — replaces G1, G2, and G3

⚠️ Always identify your board by the chip number (BP501G3R1A) on the white label near the center of the PCB — never order by appearance alone. BP501 G1, G2, and G3 boards are visually very similar.

🎛️ Board Functions & Controls

Pump Outputs:

Output	Function	Rating
Pump 1	Primary jet pump (heater pump) — 2-Speed	10A max
Pump 2	Secondary jet pump — 2-Speed via X-P332 expander at J108 / 1-Speed in Setups 3, 4, 7	10A max
Pump 3	Third jet zone — 1-Speed, Setups 1 and 3 only	10A max
Blower	Air blower — 1-Speed, Setups 2, 4, and 6	4A max

Setup Reference Table (all 8 setups):

Setup	Circ Pump	Pump 1	Pump 2	Pump 3	Blower
1 (default)	None	2-Speed	2-Speed	1-Speed	None
2	None	2-Speed	2-Speed	None	1-Speed
3	None	2-Speed	1-Speed	1-Speed	None
4	None	2-Speed	1-Speed	None	1-Speed
5	None	2-Speed	2-Speed	None	None
6	None	2-Speed	None	None	1-Speed
7	None	2-Speed	1-Speed	None	None
8	None	2-Speed	None	None	None

Heater Control:

Feature	Specification
Heater Output	5.5kW at 240V / 1.25kW at 120V (Setup 8 only)
Heater Connection	Plug & Click
Heater Pump	Pump 1 low speed (or Pump 1 low in non-circ setups)
Temperature Range (Hi)	80°F – 104°F; default 100°F
Temperature Range (Lo)	50°F – 99°F; default 70°F
Freeze Threshold	44°F — rotating pump activation

DIP Switch Summary (S1):

Switch	Function
A1	Test Mode — normally OFF
A2	ON = add 1 high-speed pump/blower with heater
A3	ON = add 2 high-speed pumps/blower with heater
A4	ON = 5-minute cooldown (gas heater); OFF = 1-minute cooldown (electric)
A5	ON = Special Amperage Rule B; OFF = Special Amperage Rule A
A6	Persistent memory reset (during power-up only)

⚠️ Setting DIP switches or jumpers incorrectly may cause abnormal system behavior and component damage. Always refer to the wiring diagram inside the spa pack cover before changing any switch.

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⚙️ 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 BP501G3R1A on the white label of your existing board
• [ ] Verify your spa has NO circulation pump — if a circ pump is present, order BP501G2 (56965-01) instead
• [ ] Disconnect all power at the breaker and disconnect box before beginning
• [ ] Photograph all existing wiring connections and note all DIP switch positions
• [ ] Allow capacitors to discharge — wait at least 5 minutes after power-off
• [ ] Note which Setup number your existing board is configured for (check label inside lid)
• [ ] Confirm whether your Pump 2 is 2-speed (expander board needed) or 1-speed

Electrical Requirements:

Requirement	Specification
Supply Voltage	240V AC / 60Hz (primary); 120V in Setup 8 only
Service Type	4-wire (hot, hot, neutral, ground) for 240V
Circuit Breaker	60A maximum (240V) / 20A maximum (120V Setup 8)
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, copper conductors only

Critical Wiring Notes:

Note	Detail
Pump 1 and Ozone voltage	Both must be wired to the same voltage
120V Setup 8 wiring	Move wires on J50 and J51 to Area 1 (Neutral); DIP switches A2 and A3 must be OFF
Blower activation	Move wire to connect J20 to J13 in Setups 2, 4, and 6
Pump 2 (2-speed)	Connect X-P332 expander board (PN 55137) at J108
Heater jumper (J44)	Center 2 pins (230V) for 240V-dedicated supply; outer 2-pin pairs for 115V with neutral

💡 Tip: Write the Setup number on the label inside the system lid immediately after configuring — the next technician to service this spa will need it.

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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 (4-wire) as the primary supply — verify 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, 90°C rated

Critical Voltage Warning:

• ⚠️ Pump 1 and the ozone generator must be wired to the same voltage — mismatching will damage components

Circ Pump Warning:

• ⚠️ This board will NOT work with a circulation pump. Installing it in a circ-pump system will cause operational failure. Use BP501G2 (56965-01) for circ-pump spas.

DIP Switch Warning:

• ⚠️ Setting DIP switches or jumpers incorrectly may cause abnormal system behavior and/or damage to components
• ⚠️ Always turn main power OFF before adjusting any DIP switch
• ⚠️ A6 is the persistent memory reset — leave in OFF position after final installation

Post-Installation:

• ⚠️ Verify Pump 1 achieves at least 20 GPM flow through the heater before extended operation
• ⚠️ Test all safety features — hi-limit sensor, GFCI — before returning the spa to service
• ⚠️ Confirm correct Setup number is active for your plumbing configuration
• ⚠️ Check for error codes on initial startup and resolve before use

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🔍 Error Codes & Troubleshooting

Common Issues After Board Replacement:

Symptom	Likely Cause	Action
“FLO” or flow fault	Pump 1 not achieving 20 GPM through heater	Prime the system, check Pump 1 operation and plumbing restrictions
Breaker trips immediately	Voltage mismatch or wiring error	Verify 4-wire 240V supply; confirm DIP switches A2/A3 match your pump count
System trips on 120V supply	Board configured for 240V when 120V was intended	Only Setup 8 supports 120V; confirm J50/J51 wires and DIP switch positions
Pump 2 not running	X-P332 expander not installed or not connected	Install expander board PN 55137 at J108 for 2-speed Pump 2
Wrong pumps responding to buttons	Incorrect Setup active	Enter test mode (S1 Switch 1 ON) and select correct Setup via topside
Blower unresponsive	J20/J13 jumper wire not moved	Move wire connecting J20 to J13 for blower operation in Setups 2, 4, or 6
Ozone not running	Voltage mismatch or ozone not slaved correctly	Verify ozone wired to same voltage as Pump 1; check W1/J50/J51 configuration
No display on topside	Topside panel version mismatch	Verify TP version meets minimum requirement (TP600 v2.7+, TP800 v3.1+)

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Balboa BP501G3 systems without a circ pump	✅ Direct OEM replacement	Exact chip match: BP501G3R1A
♨️ Spas with Pump 1 as the sole heater pump	✅ Purpose-built	Pump 1 must deliver 20 GPM through heater
♨️ 3-pump hot tubs (P1 + P2 + P3)	✅ Configurable	Setups 1 and 3; P2 requires X-P332 expander
♨️ 2-pump + blower hot tubs	✅ Configurable	Setups 2 and 4; blower requires J20/J13 wire change
♨️ Spas using TP400, TP600, or TP800 topsides	✅ Compatible	All supported at minimum version requirements
♨️ Technicians replacing legacy 56585 boards	✅ Direct upgrade	56961-01 / G1353 is the current replacement for 56585

This board is NOT suitable for:

• Spas equipped with a circulation pump — use BP501G2 (56965-01)
• Systems that require a TP200 or TP500 topside — these panels are not compatible with the BP501G3

❓ Frequently Asked Questions

Q: How do I confirm this is the right board for my spa? A: Locate the chip number on the white label near the center of your existing board. It must read BP501G3R1A. Also check the system pack exterior label for a model number referencing BP501G3. If you see 56582, 56583, 56584, or 56585 on the board or system, this is the correct replacement.

Q: What happens if I install this board in a spa that has a circ pump? A: The system will not function correctly. The BP501G3 does not support a circ pump output. For spas with a circ pump, you need the BP501G2 (56965-01). Using the wrong variant will cause operational failures.

Q: My spa has a 2-speed Pump 2 — do I need anything else? A: Yes. The 56961-01 main board alone does not drive 2-speed Pump 2. You need the X-P332 expander board (PN 55137) connected at J108 with a 30A fuse. Contact Parts4Tubs if you need both components.

Q: What Setup does the board ship in? A: Setup 1 — which configures 2-speed Pump 1, 2-speed Pump 2 (via expander), 1-speed Pump 3, no blower. You may need to change the Setup to match your actual plumbing via the test menu on the topside. Write the correct Setup number on the label inside the lid.

Q: Can the BP7 control system replace my BP501G3? A: Yes. The Balboa BP7 is the recommended full-system replacement for worn-out BP501-series spa packs. It works with all TP topsides and delivers a modern control platform. Contact Parts4Tubs for the right BP7 kit for your spa.

Q: Which topside panels work with this board? A: TP400T (v2.7+), TP400W (any version, single-pump setups only), TP600 (v2.7+), and TP800 (v3.1+). The TP400T cannot be used in Setups 1–4 (those with both Pump 2 and Pump 3 or Blower). TP200 and TP500 are not compatible with this board.

Q: Can I return this board if it’s incorrect? A: Circuit boards are non-returnable. Verify your chip number (BP501G3R1A) and confirm your spa has no circ pump before ordering. Contact our team — we’ll help confirm the correct board.

Q: What warranty does this board carry? A: Covered under the Balboa Water Group manufacturer’s warranty. Contact Parts4Tubs for full terms and conditions.

📥 Downloads & Resources

📄 Balboa BP501G3 Tech Sheet — 56582/56583/56584_97_A — Official Balboa tech sheet with complete wiring diagram, all 8 setups, DIP switch definitions, and panel configurations

🏆 Why Choose the Balboa BP501G3 Board (56961-01 / G1353)

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

✅ Eight Configurable Setups — More pump configuration flexibility than any other BP501 variant; adapts to 1-pump through 3-pump spa plumbing

✅ Full 5.5kW at 240V — Maximum heating power for high-demand spa configurations

✅ 2-Speed Dual Pump Capable — Two independent 2-speed pump zones with the X-P332 expander

✅ TP400, TP600, and TP800 Compatible — Broad topside flexibility including bba™ Bluetooth audio support on TP800

✅ Persistent Memory (Non-Battery) — Filter cycles, temperature, and settings retained through power outages; reset via A6 DIP switch

✅ Factory-New, Never Installed — Non-returnable policy ensures every board shipped is pristine and direct from the factory

🤝 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)

✅ X-P332 expander boards, TP topsides, BP7 systems, and accessories available

✅ Help confirming G1/G2/G3 variant or BP7 upgrade path before you order

✨ Summary

The Balboa BP501G3 circuit board (56961-01 / G1353, chip BP501G3R1A) is the genuine OEM main PCB for BP501G3 systems — the no-circ-pump variant of the BP501 family. Running on 240V / 60Hz with a 60A circuit, it supports a 2-speed Pump 1 (heater pump), 2-speed Pump 2 (via X-P332 expander at J108), 1-speed Pump 3, blower, a 5.5kW heater, ozone, 10V light, and audio — across eight software-selectable setups. A circ pump will not work with this board; use BP501G2 (56965-01) for circ-pump systems. Compatible with TP400, TP600, and TP800 topsides. Ships in Setup 1 and requires field configuration. Verify chip number BP501G3R1A 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.