🔌 Balboa BP501G2 Spa Circuit Board — G1352 (Circ Pump Version)

The genuine Balboa replacement board that unlocks circ pump + 2-speed pump operation in BP501 spa systems

📋 Product Overview

The Balboa BP501G2 Circuit Board (G1352) is a genuine Balboa Water Group main PCB and the definitive replacement for spa control systems built on the BP501G2 platform. It is the specific BP501 variant engineered to support a dedicated circulation pump running simultaneously with a 2-speed primary pump — a combination that the standard BP501G1 board cannot support.

⚠️ Critical requirement: Your spa MUST already have a dedicated circulation pump installed to use this board. If your spa does not have a circ pump, see the BP501G1 board instead.

The BP501G2 board controls the full range of hot tub functions: dual-speed primary pump operation, 1-speed secondary pump or blower, dedicated circulation pump filtration and continuous polling, ozone generator, spa light, audio/visual output, and precision dual-range temperature control. Its defining advantage over the BP501G1 is the ability to run a 2-speed Pump 1 alongside a dedicated circ pump — a configuration found in many high-end hot tub designs where continuous water circulation is maintained separately from jet pump operation.

Compatible with all Balboa TP-series topside control panels and an extremely wide range of hot tub brands manufactured with the BP501G2 control platform, the G1352 is also recommended as the upgrade path when a BP7 control system is specified as an alternative replacement. This board serves as the genuine OEM replacement for multiple BP501 variants and is the correct choice for any spa system where the original board carries the BP501G2 designation.

Tech Sheet Download

✨ Key Feature

✅ Circ Pump + 2-Speed Pump 1 Operation — The defining feature of the BP501G2: supports a dedicated 24-hour circulation pump running simultaneously with a 2-speed primary jet pump — a configuration the BP501G1 cannot achieve

✅ Genuine Balboa Water Group OEM PCB — Factory original G1352 board; not an aftermarket substitute; ensures full software, relay, and firmware compatibility with BP501G2 control systems

✅ Supports Up to Two Jet Pumps Plus Blower — Pump 1 (2-speed or 1-speed), Pump 2 (1-speed), and a Blower output via optional expander card — covers virtually every BP501G2 spa equipment configuration

✅ Wide Topside Panel Compatibility — Works with all Balboa TP-series control panels including TP540, TP600, TP800, TP900, and full spaTouch® family

✅ Broad Brand Compatibility — Used across a wide range of hot tub manufacturers including Cal Spas, Marquis Spas, Master Spas, Coast Spas, Bullfrog Spas, Vita Spas, Clearwater Spas, and others

✅ Dual Voltage Capability — Operates on 240VAC (standard) with 120VAC support for select setups; Pump 1, Circ Pump, and Ozone must all be the same voltage

✅ Integrated Safety Systems — Built-in GFCI trip detection, freeze protection, hi-limit sensor monitoring (Sensor A and Sensor B), and heater dry-detection circuitry

✅ BP7 Alternative Available — If the BP501G2 board is unavailable, the Balboa BP7 Control System is a compatible upgrade that works with all TP topside panels

✅ 1-Year Manufacturer Warranty — Backed by Balboa Water Group’s standard 1-year limited warranty on PCB components

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⚙️ Technical Specifications

Specification	Value
Manufacturer Part Number	G1352
Alternate Part Numbers	56965, 56965-1
Board Platform	BP501G2
Board Type	Main PCB / Control Board
Circ Pump Requirement	⚠️ Mandatory — spa MUST have a dedicated circ pump
Primary Input Voltage	240VAC, 60Hz
Alternative Input Voltage	120VAC — select setups only
Maximum Service Amperage (240V)	48A
Circuit Breaker (240V)	60A maximum
Minimum Wire Gauge	#6 AWG copper, 90°C rated
Heater Connection Torque	30–35 in. lbs.
Pump 1 Output	240VAC, 2-Speed or 1-Speed (1-Speed when circ pump enabled), 12A max
Pump 2 Output	240VAC, 1-Speed, 12A max
Blower Output	240VAC, 1-Speed, 4A max
Circulation Pump Output	Same voltage as Pump 1 and Ozone, 2A max
Ozone Output	Same voltage as Pump 1 and Circ Pump, 0.5A max
Spa Light Output	10VAC
A/V (Stereo) Output	120VAC, 4A max
Heater Compatibility	5.5kW @ 240VAC (Incoloy or Titanium variants)
Heater Flow Requirement	Minimum 20–23 GPM through heater
Hi-Range Temperature	80°F–104°F (26.7°C–40°C)
Lo-Range Temperature	50°F–99°F (10°C–37.2°C)
GFCI	Class A GFCI required — per NEC Article 680-42
Certifications	Please refer to manufacturer documentation or contact Parts4Tubs
Warranty	1 Year (Balboa Water Group)
Physical Dimensions	Please refer to manufacturer documentation or contact Parts4Tubs
Operating Temperature Range	Please refer to manufacturer documentation or contact Parts4Tubs

⚠️ US Voltage Note: This is a North American board designed for 240VAC / 60Hz service. Always confirm your spa’s electrical configuration before ordering.

⚠️ Critical Voltage Rule: Pump 1, the Circulation Pump, and the Ozone Generator MUST all be configured for the same voltage. Mixing voltages between these three outputs will cause damage or failure.

ℹ️ Pump 1 note: When the circ pump is configured for 24-hour continuous operation, Pump 1 must be wired as a 1-speed pump. The 2-speed pump 1 configuration is used in non-circ or programmable filtration setups.

🔄 Compatibility Guide

This Board Replaces

Part Number	Description
G1352	Balboa Water Group — current PCB part number
56965 / 56965-1	Balboa alternate OEM numbers
56480	Complete BP501G2 system — 800 Incoloy heater
56486	Complete BP501G2 system — 825 Incoloy heater
56482	Complete BP501G2 system — Titanium heater
BP501-G1 (circ-capable variant)	Where circ pump is installed
BP501-G2	Direct match
BP501-G3	Compatible replacement
38928, 56483, 56488, 56585, 56944, 56961	Other BP501 board references

Compatible Topside Control Panels

Panel	Notes
TP600	Confirmed compatible
TP540	Confirmed compatible
TP800	Confirmed compatible
TP900	Confirmed compatible
spaTouch™ series	All versions
All Balboa TP panels	This board is compatible with all TP topsides

Compatible Spa Brands (Non-Exhaustive)

The BP501G2 board was used by a wide range of hot tub manufacturers. Confirmed brands using this platform include:

Brand
Cal Spas
Marquis Spas
Master Spas
Coast Spas
Bullfrog Spas
Vita Spas
Clearwater Spas
Catalina Spas
Signature Spas

⚠️ Compatibility is determined by the part number on your existing circuit board — NOT by your spa’s brand name. Always locate the label on the PCB inside the control box and match that number before ordering. Many spa brands use multiple different control systems across different model years.

🎛️ Board Functions & Controls

Key Difference: BP501G2 vs. BP501G1

Feature	BP501G1	BP501G2 (G1352)
Circ Pump + 2-Speed Pump 1	❌ Not supported	✅ Supported
Circ Pump + 1-Speed Pump 1	✅ Supported	✅ Supported
2-Speed Pump 1 (no circ)	✅ Supported	✅ Supported
Pump 2 (1-Speed)	✅ Setups 1 & 2	✅ Supported
Blower	✅ Setups 3 & 4	✅ Supported

Pump Control

Output	Function	Rating	Notes
Pump 1	Primary jet pump, 2-Speed or 1-Speed	240VAC, 12A max	Must be 1-speed when used with 24-hr circ pump
Pump 2	Secondary jets, 1-Speed	240VAC, 12A max	Optional; requires appropriate setup
Blower	Air blower, 1-Speed	240VAC, 4A max	Optional via expander; setup-dependent
Circ Pump	24-hr dedicated circulation	Same voltage as P1 & Ozone, 2A max	⚠️ Required — spa must have circ pump installed
Ozone	Ozone generator	0.5A max	Must match voltage of P1 and Circ Pump

Heater Control

Feature	Specification
Heater Output	5.5kW @ 240VAC
Heater Type	Balboa Incoloy (800/825) or Titanium element
Hi-Limit Protection	Built-in via Sensor A and Sensor B
Dry Heater Detection	Built-in circuit
Minimum Flow	20–23 GPM through heater required

Alternate Replacement Option

💡 BP7 Upgrade Path: As noted in the product description, the Balboa BP7 Control System can be used as a compatible replacement for the BP501G2 and works with all Balboa TP topside panels. The BP7 offers expanded features including up to 4 pump outputs, 32 setup configurations, Wi-Fi module support, and Bluetooth Audio. Contact Parts4Tubs to discuss whether the BP7 upgrade is the right option for your spa.

🔧 Installation Requirements

⚠️ IMPORTANT: All electrical work must be performed by a licensed electrician in compliance with the National Electrical Code (NEC) Article 680 and all applicable local codes.

Pre-Installation Checklist

• [ ] Confirm the existing board’s part number is a BP501G2 variant (G1352, 56965, 56480, 56486, 56482, or another listed BP501G2 system number)
• [ ] Verify your spa HAS a dedicated circulation pump — this board will not function correctly without one
• [ ] Note the current setup number from the label inside the system lid
• [ ] Disconnect ALL power at the circuit breaker and GFCI before beginning
• [ ] Photograph all wiring and connector positions before removing the old board
• [ ] Allow capacitors to discharge — wait at least 5 minutes after power-off
• [ ] Confirm heater size (5.5kW) and heater type (Incoloy or Titanium)

Electrical Requirements

Requirement	Specification
Supply Voltage (standard)	240VAC / 60Hz
Maximum Service Amperage	48A
Circuit Breaker (240V)	60A maximum
GFCI Protection	Class A GFCI required — NEC Article 680-42
Ground Connection	Equipment grounding and bonding — NEC Article 680
Bonding Conductor	Solid copper to all metal within 5 ft of spa
Minimum Wire Gauge	#6 AWG copper, 90°C rated
Heater Connection Torque	30–35 in. lbs.
Dedicated Circuit	Required
Disconnect	Within line of sight of spa, at least 5 ft from water (NEC)

💡 Tip: Write the current Setup number on the label inside the system lid using a permanent marker before removing the old board — this is critical for configuring the replacement correctly.

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⚠️ Safety Warnings

Electrical Safety:

• ⚠️ ALWAYS disconnect ALL power at the breaker and GFCI before touching any wiring
• ⚠️ Installation MUST be performed by a licensed electrician only
• ⚠️ This board requires 240VAC / 60Hz North American electrical service — verify before connecting
• ⚠️ Class A GFCI protection is mandatory per NEC Article 680-42
• ⚠️ Use copper conductors ONLY — no aluminum wiring
• ⚠️ A dedicated circuit and disconnect within line of sight of the spa are required by NEC
• ⚠️ Never operate spa with covers removed from the electrical control enclosure

Board-Specific Warnings:

• ⚠️ DO NOT install this board in a spa without a dedicated circulation pump — the board requires a circ pump to operate correctly in circ-enabled setups
• ⚠️ Pump 1, Circ Pump, and Ozone must ALL be configured for the same voltage — mixing voltages damages components
• ⚠️ When using a 24-hour circ pump, Pump 1 MUST be configured as 1-speed
• ⚠️ Setting DIP switches incorrectly may cause abnormal behavior or component damage
• ⚠️ Do not select a replacement board based on appearance — always match by part number

Post-Installation:

• ⚠️ Run Priming Mode and verify all pumps are primed before heater activation
• ⚠️ Test GFCI function, hi-limit sensors, and freeze protection before first use
• ⚠️ Check topside display for error codes on initial startup

🔍 Error Codes & Troubleshooting

Common Topside Display Messages

Code	Meaning	First Action
dr	Heater may be dry — will retest	Check water level, filter cleanliness, closed valves, circ pump prime, flow rate
drY / dY	Verified dry heater — spa disabled	Resolve flow/circ pump issue; press any button to reset after fix
CFE / CONFIG ERROR	DIP switch configuration conflict	Check DIP switch settings match the spa’s equipment configuration
CrC / CHKSUM FAIL	Firmware checksum error at power-up	Power off/on; if repeated, contact dealer
Sn / SN	Sensor fault (temperature or hi-limit)	Check sensor wiring; swap Sensor A and B to isolate the faulty sensor
– – –	Water temperature unknown	Normal — wait at least 2 minutes with heater pump running
FLO / Flow	Low flow / pressure switch issue	Check filter, water level, circ pump operation, and valves

Troubleshooting Quick Reference

Symptom	Likely Cause	First Step
Nothing operates	Breaker off / GFCI tripped	Reset breaker and GFCI; restore power
No heat	Low flow, circ pump not running, wrong setup	Check circ pump operation, filter condition, and water level
GFCI trips immediately	Wiring fault or improper GFCI install	Contact licensed electrician
Circ pump not running	Wrong setup or voltage mismatch	Verify setup selection and circ pump voltage matches Pump 1 and Ozone
Pump 1 only runs at 1-speed	Correct — circ pump mode requires 1-speed P1	Normal operation when 24-hr circ is configured
Display shows “T” after temperature	Test Mode active (DIP Switch 1 ON)	Move Switch 1 to OFF position to exit Test Mode

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Spa with dedicated circ pump + 2-speed jets	✅ Perfect fit	This is the primary use case for the BP501G2
♨️ Spa with dedicated circ pump + 1-speed jets	✅ Supported	Works in circ-enabled setups
♨️ Spa running two jet pumps + circ pump	✅ Supported	Pump 1 + Pump 2 + Circ — all supported
♨️ Replacing a failed BP501G2 board	✅ Direct replacement	Match Setup number; configure DIP switches accordingly
♨️ Upgrading from BP501G1 (circ pump needed)	✅ Correct upgrade	BP501G1 cannot combine circ with 2-speed pump 1
♨️ Spa WITHOUT a circ pump	❌ Not suitable	Use BP501G1 instead; this board requires a circ pump
♨️ Spa requiring BP7 functionality upgrade	✅ See BP7 alternative	BP7 system is a compatible upgrade offering more features

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❓ Frequently Asked Questions

Q: How do I know if this board fits my spa? A: Locate the part number label on the existing circuit board inside your spa’s control box. If it reads G1352, 56965, 56965-1, or any of the system numbers (56480, 56486, 56482), this is the correct replacement. Contact Parts4Tubs with your system label if uncertain.

Q: My spa has a circ pump — will this board work? A: Yes, provided your spa’s existing main board is a BP501G2 variant. Verify by checking the board label. This board is specifically designed to support the circ pump + 2-speed pump configuration that the BP501G1 does not allow.

Q: My spa doesn’t have a circ pump — can I still use this board? A: No. This board requires a dedicated circulation pump for correct operation. If your spa does not have a circ pump, you need the BP501G1 board instead.

Q: What is the difference between the BP501G1 and BP501G2? A: The critical difference is that the BP501G2 allows a dedicated circ pump to run simultaneously with a 2-speed Pump 1, while the BP501G1 only allows a circ pump with a 1-speed Pump 1. If your spa has a circ pump and a 2-speed primary pump, you must use the BP501G2 (G1352).

Q: Can I upgrade to the BP7 system instead? A: Yes. The Balboa BP7 Control System is a compatible upgrade that works with all TP topside panels and offers expanded functionality including up to 4 pump outputs, 32 setup configurations, Wi-Fi, and Bluetooth Audio. Contact Parts4Tubs for guidance on whether the BP7 upgrade is the right choice for your spa.

Q: Do I need a licensed electrician to install this? A: Yes. NEC Article 680 and most local jurisdictions require a licensed electrician for all spa electrical work, including board replacement. A permit may also be required. Incorrect installation can cause fire, electrocution, or equipment damage.

Q: Will my existing topside panel work with this board? A: This board is compatible with all Balboa TP-series topside panels. Contact Parts4Tubs with your panel model number if uncertain.

Q: What warranty is included? A: Balboa Water Group provides a 1-year limited warranty against defects in materials and workmanship from the date of purchase. Contact Parts4Tubs for warranty claim assistance.

Q: Why does Pump 1 only run at 1-speed in my circ pump configuration? A: This is expected and correct behavior. When the circ pump is configured for 24-hour continuous operation, the BP501G2 requires Pump 1 to operate as a 1-speed pump. The 2-speed Pump 1 configuration is available in non-circ setups where the pump also performs the heating function.

🏆 Why Choose the Balboa BP501G2 (G1352)?

✅ The Only BP501 Board That Combines Circ Pump and 2-Speed Pump — If your spa is designed with a dedicated 24-hour circulation pump running alongside a 2-speed jet pump, this is the only genuine Balboa board that correctly supports that configuration

✅ Genuine OEM Component — Actual Balboa Water Group board with correct relay ratings, software version, and heater control logic for BP501G2 systems; not an aftermarket substitute

✅ Broad Brand Coverage — Replaces BP501G2 boards in spas from Cal Spas, Marquis, Master Spas, Coast Spas, Bullfrog, Vita Spas, Clearwater, and many more

✅ Full TP Panel Compatibility — Works with all Balboa topside panels from the TP200 series through TP900 and the full spaTouch® graphic display family

✅ Energy Efficiency — The dedicated circ pump design enables 24-hour water circulation at low power, keeping water clean without running the full jet pump

✅ Built-In Safety — Class A GFCI trip detection, freeze protection, dual hi-limit sensor monitoring, and heater dry-detection all integrated into board logic

✅ BP7 Upgrade Path Available — If expanded functionality is needed, the BP7 system is a confirmed compatible upgrade

✅ 1-Year Manufacturer Warranty — Backed by Balboa Water Group

🤝 Why Buy From Parts4Tubs?

✅ US-based company with expert local support
✅ Fast US shipping on in-stock parts
✅ Spa specialists available for technical advice and compatibility verification
✅ Competitive pricing on genuine Balboa OEM parts
✅ Full warranty support — we handle claims with the manufacturer on your behalf
✅ Easy returns within 30 days on eligible items
✅ Compatible accessories available — topside panels, sensors, heater kits, and more
✅ Expert guidance on whether BP501G2 or BP7 upgrade is right for your spa

🔌 Summary

The Balboa BP501G2 Circuit Board (G1352) is the genuine OEM replacement for BP501G2 spa control systems — and the only BP501-series board that correctly supports a dedicated 24-hour circulation pump operating simultaneously with a 2-speed primary jet pump. Essential for any spa configured with this combination, the G1352 covers a wide range of hot tub brands including Cal Spas, Marquis, Master Spas, and many others. It is compatible with all Balboa TP topside panels, features built-in safety protections including GFCI trip detection and freeze protection, and is backed by a 1-year Balboa warranty. If your spa has a circ pump and your existing board is a BP501G2 variant, this is the correct part. Order from Parts4Tubs today and get your spa running again.

Parts4Tubs is proud to be a Balboa Authorized Online Seller - make sure you only buy genuine Balboa parts from trusted sources.

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.