💡 Balboa BP100G1 Spa Circuit Board – 1-Pump Mini+ Control (P/N 59187 Series)

Precision-engineered Balboa replacement PCB that keeps your 1-pump hot tub running exactly the way it was designed to.

🔌 Product Overview

The Balboa BP100G1 is the main circuit board for Balboa’s BP100 Mini+ spa control platform — the compact 1-pump controller Balboa builds for smaller portable hot tubs, rotomolded spas, and single-pump upgrade installations. This board is the OEM replacement for factory part numbers 59187-02, 59187-03, 59188-03, and 59251-03, and is the current-production PCB used inside BP100 Integral-Heater and Remote-Heater systems.

In a single compact footprint, the BP100G1 drives one 2-speed jet pump (or a 1-speed pump plus a dedicated circulation pump), an ozonator, a 10 VAC spa light, a 240 VAC AV circuit, and either a 4.0 kW or 5.5 kW integral heater — or a remote heater sold separately. It auto-detects 50 Hz vs 60 Hz, is wired for 240 VAC / 48 A service by default with optional 120 VAC / 16 A configuration, and supports Balboa’s full topside lineup: spaTouch™ Mini, spaTouch™2, spaTouch™3, TP700/TP740, TP600, TP500, TP400, and TP200.

Installing the genuine Balboa board restores normal pump, heater, filter, and light operation and reinstates Balboa’s M7 dual-sensor heater safety system and the full BP100 diagnostic fault history. Circuit boards are non-returnable, so please verify fit before ordering.

✨ Key Features

• ✅ Factory Balboa BP100G1 replacement – covers P/Ns 59187-02, 59187-03, 59188-03, and 59251-03 (per the BP100G1 Tech Sheet revision history)
• ✅ Three hardware Setup modes – Setup 1: circ + 1-speed jet pump; Setup 2: 2-speed jet pump, no circ (default factory setting); Setup 3: circ only, no jet pump
• ✅ Dual-voltage input – 240 VAC / 48 A (Class A GFCI, 60 A max breaker) or 120 VAC / 16 A (20 A wall-mount GFCI) service, 50/60 Hz auto-detect
• ✅ M7 dual-sensor heater safety – Sensor A + Sensor B on the heater for redundant temperature / hi-limit protection
• ✅ Integral or remote heater support – 59187-03 (5.5 kW 825 Incoloy), 59188-03 (4.0 kW 825 Incoloy), or 59251-03 (remote heater sold separately)
• ✅ Full Balboa topside compatibility – spaTouch™ Mini, spaTouch™2, spaTouch™3, TP700/740, TP600, TP500, TP400T/W, and TP200T/W
• ✅ Clim8zone™ heat-pump ready – supports Balboa’s integrated heat-pump accessory (240 VAC only; not supported in 120 VAC mode)
• ✅ CHROMAZON3™ lighting support – on spaTouch™2 v2.19+ panels
• ✅ Integrated bba™2 / bba™3 Bluetooth audio – with TP700/740 and spaTouch™ graphic panels, or via “BT” menu on TP200/400/500/600
• ✅ Programmable filtration + polling – configurable filter cycles with optional second daily cycle
• ✅ 10 VAC spa light output with 240-minute default time-out
• ✅ Freeze protection at 44°F with rotating low-speed pump cycling
• ✅ UL-listed system model – BP1-BP100G1-BU (5.5 kW), BP1-BP100G1-BS (4.0 kW), BP1-BP100G1-B (remote heater)

⚙️ Technical Specifications

Specification	Value
Main PCB Part Number (replacement)	59494-01
System P/Ns this board serves	59187-03 (5.5 kW integral), 59188-03 (4.0 kW integral), 59251-03 (remote heater)
Platform	Balboa BP100 (BP100G1 revision)
Software Version ID	M100_230 V72.0
UL System Model (5.5 kW)	BP1-BP100G1-BU
UL System Model (4.0 kW)	BP1-BP100G1-BS
UL System Model (Remote Heater)	BP1-BP100G1-B
Input Voltage (Primary)	240 VAC, 50/60 Hz, 48 A, Class A GFCI-protected
Circuit Breaker (240 VAC)	60 A max.
Supply Wiring (240 VAC)	4 wires: hot, hot, neutral, ground (#6 AWG min., 90°C conductors, copper only)
Input Voltage (Alternate)	120/240 VAC, 50/60 Hz, 16/40 A, Class A GFCI-protected
Circuit Breaker (120 VAC wall GFCI)	20 A max.
Circuit Breaker (120 VAC cord)	15 A max. (service limited to 12 A)
Frequency	50 Hz / 60 Hz (auto-detected; UL system — use only on UL power territories)
Pump 1 Output	240 VAC, 2-speed, 12 A max, 15-minute timer (30-minute timer for P1 Low in non-circ Setup 2)
Circulation Pump Output	240 VAC, 1-speed, 2 A max, programmable filtration + polling
Ozone Output	240 VAC, 0.5 A max, slaved to circ pump (circ setups) or Pump 1 Low (non-circ setups)
Spa Light Output	10 VAC, 1 A max, 240-minute timer
AV + Clim8zone™ Output (J33)	240 VAC, 2 A + 8 A max, always on (C8Z not supported in 120 VAC mode)
Heater — 5.5 kW model	5.5 kW @ 240 VAC (~1.4 kW @ 120 VAC), 825 Incoloy
Heater — 4.0 kW model	4.0 kW @ 240 VAC (~1.0 kW @ 120 VAC), 825 Incoloy
Heater Type	Integral or remote (M7 dual-sensor)
Heater Element (5.5 kW P/N)	58439R16
Heater Element (4.0 kW P/N)	58506R16
Temp Sensor Kit (12″)	30344KIT
Temp Sensor Kit (24″)	30382KIT
Main Power Fuse (F6)	30 A, 250 VAC (P/N 30136)
Fuses F4, F5	1 A slo-blow (P/N 26983)
Fuse F3	0.16 A slo-blow (P/N 26982)
Temperature Set Range (Hi-Range)	80°F – 104°F (27°C – 40°C) — factory default 100°F
Temperature Set Range (Lo-Range)	50°F – 99°F (10°C – 37°C) — factory default 70°F
Freeze Threshold	44°F (6.7°C)
Temperature Display	°F default (°C selectable)
Heater Connection Torque	30 – 35 in-lbs
TB1 Terminal Torque	27 – 30 in-lbs
Wire Rating	#6 AWG min., copper only, 90°C minimum
Returnable	⚠️ No – circuit boards are non-returnable

ℹ️ Voltage note: The BP100G1 is a dual-voltage board. Every unit ships factory-configured in Setup 2 (240 VAC, 2-speed Pump 1, no circ). If your spa runs 120 VAC, or needs Setup 1 (1-speed Pump 1 + circ) or Setup 3 (circ only, no jet pump), you must change the Setup in the Test Menu AND move the J24 and J31 jumpers to the correct positions as shown in the Balboa wiring diagram. Installing in the wrong mode can damage the heater, pump, or board.

🔗 Compatibility Guide

Compatible Spa Applications

This BP100 platform is used as the factory controller or as a drop-in / universal replacement in a broad range of smaller, 1-pump spas where equipment bay space is limited. Typical applications include portable, rotomolded, and entry-level hot tubs such as:

Application Category	Notes
Portable and rotomolded 1-pump hot tubs	Plug-and-play or hardwired
Single-pump premium spas with a dedicated circulation pump	Use Setup 1
2-speed single-pump spas without a circulation pump	Use Setup 2 (default)
Circ-only spas with no jet pump	Use Setup 3

⚠️ This is a single-pump-base controller. If your spa uses a second jet pump, you also need the Balboa BP100 Expander / Daughter Board (G1940, P/N 59232) which adds one additional 1-speed pump relay at 12 A max. If your spa requires more than one additional pump, this is not the correct platform — contact Parts4Tubs for a BP501 or BP2000 series recommendation.

OEM Part Numbers This Board Replaces

OEM / Associated P/N	Description
59187, 59187-01, 59187-02, 59187-03	BP100G1 Integral Heater, 5.5 kW 825 Incoloy
59188, 59188-01, 59188-02, 59188-03	BP100G1 Integral Heater, 4.0 kW 825 Incoloy
59251, 59251-01, 59251-02, 59251-03	BP100G1 Remote Heater version (heater sold separately)

Compatible Topside Panels

Panel Family	Version Requirement
spaTouch™ Mini	Any version (v1.0+ for Clim8zone™ heat-pump support)
spaTouch™3	Any version (v3.2+ for Clim8zone™ heat-pump support)
spaTouch™2	Any version (v2.19+ for CHROMAZON3™; v2.36+ for Clim8zone™)
TP700 / TP740	Any version (v1.27+ for Clim8zone™)
TP600	v2.7+ (v2.12+ for bba™/bba™2 toggle)
TP500	Any version
TP400T / TP400W (US)	v2.7+ (v2.12+ for bba™/bba™2 toggle)
TP200T / TP200W	Any version

ℹ️ TP700/740, TP800, and TP600 are not officially supported in Setup 3 (circ-only, no jet pump). Use a spaTouch™ panel for Setup 3.

🎛️ Board Functions & Controls

Setup Reference Table (factory-selectable via Test Menu)

Setup #	Circulation Pump	Pump 1	Temp Scale	Factory Default
1	Programmable Filtration + Polling	1-speed	°F	—
2	None	2-speed	°F	✅ Default
3	Programmable Filtration + Polling	None (circ only)	°F	—

System Outputs Summary

Output	Voltage	Speed / Type	Max Current	Notes
Pump 1	240 VAC*	2-speed (Setup 2) or 1-speed (Setup 1)	12 A	Heater pump in Setup 2; must deliver 20 GPM through heater
Circulation Pump	240 VAC*	1-speed	2 A	Heater pump in Setups 1 & 3; must deliver 20 GPM through heater
Ozone	240 VAC*	On/Off	0.5 A	Slaved to circ pump (circ setups) or Pump 1 Low (non-circ)
Spa Light	10 VAC	On/Off	1 A	240-minute auto time-out
AV + Clim8zone™ (J33)	240 VAC	Always on	2 A + 8 A	Optional splitter PN 22934 for two devices; C8Z not supported at 120 VAC
Heater	240 VAC	Continuous	5.5 kW or 4.0 kW	~1.4 kW / 1.0 kW derated at 120 VAC

*In 120 VAC-input mode, Pump 1, Circ Pump, Ozone, and AV must all be 120 V.

DIP Switch Functions (S1 Switchbank)

Switch	Function
A1	Test Mode (normally OFF)
A2	ON = allow 1 high-speed pump/blower to run with heater
A3	ON = allow 2 high-speed pumps (or 1 HS pump + blower) with heater
A2 + A3 both ON	Allow up to 3 high-speed pumps (or 2 HS + blower) with heater
A4	ON = 5-min gas-heater cooldown (Cooling Time B); OFF = 1-min electric cooldown (Cooling Time A)
A5	ON = Special Amperage Rule B; OFF = Rule A
A6	Persistent memory reset (used during power-up to restore factory settings)
A7	ON = Simplified Menus on TP200/400/500/600 (do NOT use with TP700/740 or spaTouch™ panels); OFF = regular menus
A8	Not assigned

⚠️ Switch 7 must be OFF when using TP700/740 or spaTouch™ graphic panels, and should be OFF when using WiFi (which does not support Simplified Menus).

Jumper Definitions

Jumper	Function
J109	GFCI Test/Trip enable/disable (also requires software enable)
J30	Do not use
J31	1 pin for 120 VAC heater; 2 pins for 240 VAC heater
J24	Center two pins (240V) for 240 VAC heater; two jumpers (one on left pair, one on right pair) for 120 VAC heater

Temperature & Time Features

Feature	Default	Range
Hi-Range Min. Set	80°F	50°F – 80°F
Hi-Range Max. Set	104°F	60°F – 104°F
Hi-Range Default	100°F	50°F – 104°F
Lo-Range Min. Set	50°F	50°F – 80°F
Lo-Range Max. Set	99°F	60°F – 99°F
Lo-Range Default	70°F	50°F – 99°F
Freeze Threshold	44°F	(fixed)
Filter 1 Start	20:00	00:00 – 23:00
Filter 1 Duration	2 hours	15 min – 23:45 (or continuous)
Filter 2	Disabled by default	15 min – 23:45 (or continuous / disabled)
Light Cycle Duration	15 min (when enabled)	15 min – 4:00
Light Timer	240 minutes	configurable
Pump 1 Low Timer	30 minutes	non-circ Setup 2 only
General Pump Timer	15 minutes
Cooling Time A	1 minute	electric heaters
Cooling Time B	5 minutes	gas heaters

Configuration Reminders (user-visible)

Clean Filter (30 days default), Drain Water (100 days default), Change Filter (365 days default), plus configurable Check pH, Check Sanitizer, Test GFCI, Change Cartridge, Clean Cover, and Treat Wood — each adjustable between 7 and 180 days (or 365), and can be disabled individually.

🛠️ Installation Requirements

Pre-Installation Checklist

• [ ] Confirm your existing system is BP100G1 family (P/N 59187-xx, 59188-xx, or 59251-xx)
• [ ] Note your existing DIP switch (S1) positions — photograph them
• [ ] Note your existing J24 and J31 jumper positions — photograph them
• [ ] Note the Setup number currently configured (look for the marker on the inside of the system lid)
• [ ] Disconnect all power at the house breaker AND at the spa disconnect box
• [ ] Allow capacitors to discharge for at least 5 minutes
• [ ] Inspect M7 temperature sensors (30344KIT or 30382KIT) and replace if intermittent faults have been logged

Electrical Requirements

Requirement	240 VAC Configuration	120 VAC Configuration
Supply Voltage	240 VAC, 50/60 Hz	120 VAC, 50/60 Hz
Maximum Service Amps	48 A	16 A (12 A with GFCI cord)
Circuit Breaker	60 A max	20 A wall GFCI / 15 A cord GFCI
GFCI	Class A, required	Class A, required
Supply Wires	4 wires (hot, hot, neutral, ground)	3 or 4 wires (hot, neutral, ground; hot2 optional)
Wire Gauge	#6 AWG min., 90°C, copper only	per NEC for 16/12 A service
Disconnect	Within line of sight, ≥ 5 ft from spa	Same

Hardware Setup Sequence (240 VAC Heater)

1. Wire TB1: WHT to terminal 1, BLK to terminal 2, RED to terminal 3
2. Move the J46 and J38 wires from Area 3 to Area 1
3. Move the J24 jumper to the 240V (center two pins) position
4. Set the J31 jumper on 2 pins
5. Confirm DIP A7 is OFF (for graphic panels)
6. Verify heater connection torque: 30 – 35 in-lbs
7. Verify TB1 torque: 27 – 30 in-lbs

Hardware Setup Sequence (120 VAC Heater)

1. DIP switches A2 and A3 must be OFF when configured for 120 VAC
2. J24 jumper must be in 120V position (two jumpers, one on left 2 pins, one on right 2 pins)
3. J31 jumper must be on 1 pin only
4. Pump 1, Ozone, Circ, and AV must ALL be 120 V in this configuration (C8Z is not supported at 120 VAC)

HiPot Testing Note

Per the Tech Sheet: disconnect the slip terminal with green wires from J6 prior to HiPot testing. Failure to do so may cause a false failure. Reconnect to J6 after successful completion of the test.

💡 Tip: Using a permanent marker, write your Setup number on the Setup label mounted inside the system lid. This is critical for any future technician who needs to replace a board and match the Setup.

⚠️ Safety Warnings

Electrical Safety

• ⚠️ ALWAYS disconnect power at the house breaker AND spa disconnect before any work
• ⚠️ Installation by licensed electrician only
• ⚠️ Verify voltage jumpers (J24, J31) and DIP switches match your spa’s wired supply voltage BEFORE energizing — miswiring can destroy the heater, pump, and board
• ⚠️ Class A GFCI protection is mandatory (NEC Article 680)
• ⚠️ Disconnect must be installed within line of sight of the spa and ≥ 5 feet from the spa walls (per NEC and Balboa Tech Sheet)
• ⚠️ Use only copper conductors, #6 AWG minimum, rated for 90°C (per Balboa Tech Sheet)
• ⚠️ Total output amp draw must not exceed the max input rating of the spa
• ⚠️ Observe TB1 torque (27–30 in-lbs) and heater terminal torque (30–35 in-lbs)

Test Mode Warning (from Balboa Tech Sheet)

• ⚠️ DANGER! When DIP Switch A1 is set to ON (Test Mode), HIGH VOLTAGE will be accessible. Service technician only. Return A1 to OFF after configuration.

Water & Electrical Safety

• ⚠️ Protect the board and control box from any water ingress
• ⚠️ Inspect every seal and gasket on the enclosure before closing up
• ⚠️ Never touch electrical components with wet hands

Post-Installation

• ⚠️ Confirm M7 sensors A and B are reading consistently
• ⚠️ Verify Setup number matches spa plumbing configuration
• ⚠️ Test GFCI before and during first heat cycle
• ⚠️ Re-check DIP Switch A7 state against your topside panel family

🔍 Error Codes & Troubleshooting (Balboa BP100 Platform)

Common Balboa BP-series fault indicators are displayed on the topside panel. The following are general Balboa codes applicable to the BP100G1 platform; always cross-reference against your specific topside manual.

Code	Meaning	Suggested Action
HH / OHH	High-limit / overtemp on Sensor A or B	Check water flow; clean filter; verify sensors are fully seated; allow water to cool
Sn A / Sn B	Sensor A or Sensor B fault (open, shorted, or disagreeing)	Replace temperature sensor kit (30344KIT or 30382KIT)
dr / dry	Insufficient water in heater	Check water level, prime pump, clear airlock
FLO / FLC	Flow issue (pressure / flow switch not closing or stuck closed)	Clean filter, check circulation, check switch wiring
IC / ICE	Freeze protection engaged at 44°F	No action required; automatic
COOL / COL	Water ≥ 20°F below set point	No action required; heater will recover
—	Watchdog — unsafe condition detected, spa disabled	Shut off GFCI, check sensors/board/transformer, call qualified technician
PnL	Panel communication error	Check panel harness and plug
HOt / OH	Circuit board temperature exceeded	Improve equipment-bay ventilation

(Full BP-series fault-log viewing is available via the Test Menu → Fault Log entry on TP panels.)

🎯 Ideal Applications

Application	Suitability	Setup
1-pump, 2-speed hot tub without circulation pump	✅ Direct	Setup 2 (default)
1-pump, 1-speed hot tub with dedicated circ pump	✅ Direct	Setup 1
Circ-only spa (no jet pump)	✅ Direct	Setup 3 (spaTouch panel required)
2-jet-pump spa	⚠️ Requires BP100 Expander Board G1940 (59232) for second pump
3+ pump spa or blower	❌ Use a larger platform (BP501, BP2000, etc.)
Non-UL power territories (CE / export)	❌ This is a UL-only system — use the matching CE BP100 variant

This board is designed for:

• Replacing a failed BP100G1 (59187-xx / 59188-xx / 59251-xx) board
• Retrofitting Balboa BP100 control into a compatible 1-pump spa
• Restoring full M7 heater safety, programmable filtration, and Balboa topside panel functionality
• Enabling modern Clim8zone™ heat-pump and CHROMAZON3™ lighting accessories (with current 59187-03 production boards)

❓ Frequently Asked Questions

Q: How do I know if the BP100G1 is the right board for my spa? A: Open your spa’s equipment bay and read the label on the existing Balboa control box. If the label reads BP1-BP100G1-BU, BP1-BP100G1-BS, BP1-BP100G1-B, or the board itself is marked 59187-xx, 59188-xx, or 59251-xx, this is the correct replacement.

Q: Is this an OEM board? A: Yes. This is the genuine Balboa Water Group BP100G1 main PCB (replacement P/N 59494-01) as built per Balboa Tech Sheet 59187-03_59188-03_59251-03_B.

Q: What’s the difference between the 5.5 kW, 4.0 kW, and Remote Heater versions? A: The main PCB is the same across all three. The 5.5 kW (59187-03) and 4.0 kW (59188-03) versions ship with an integral heater (heater mounted on the board assembly). The Remote Heater version (59251-03) is sold without a heater — the heater is purchased separately and mounted remotely in the spa plumbing.

Q: Does this board support 120V, 240V, or both? A: Both, but the system ships factory-wired for 240 VAC / 48 A. Converting to 120 VAC requires moving J46 and J38 wires, repositioning J24 jumpers, moving J31 to a single pin, and setting DIP A2 and A3 to OFF. In 120 VAC mode, Pump 1, Circ, Ozone, and AV must all be 120 V — and Clim8zone™ is not supported.

Q: What Setup does the new board ship in? A: Setup 2 (2-speed Pump 1, no circulation pump). If your spa requires Setup 1 or Setup 3, you’ll need to change it via the Test Menu (DIP A1 ON → navigate to SETP screen on your panel → select new Setup → return A1 to OFF).

Q: Do I need a licensed electrician to install this? A: Yes. NEC Article 680, most local codes, and the Balboa Tech Sheet itself all require installation by qualified personnel. Incorrect voltage jumpers or DIP switches can damage the equipment; incorrect wiring can injure the installer or user.

Q: Which topside panel do I need? A: Any current Balboa topside will work — spaTouch™ Mini, spaTouch™2, spaTouch™3, TP700, TP740, TP600, TP500, TP400T/W, or TP200T/W. Check panel firmware version for advanced features (CHROMAZON3™ needs spaTouch™2 v2.19+; Clim8zone™ needs specific minimum versions per panel). TP700/740 and TP600 are not officially supported in Setup 3.

Q: Can I add a second jet pump? A: Yes — with the Balboa BP100 Expander / Daughter Board (G1940, P/N 59232). This adds one additional 1-speed pump relay at 12 A max.

Q: Does it support Bluetooth audio? A: Yes. bba™2 / bba™3 (Balboa Bluetooth Amp) is integrated with TP700/740 and spaTouch™ graphic panels; on TP200/400/500/600, use the “BT” menu entry to toggle bba™ power.

Q: Can I return it if it doesn’t fix my problem? A: ⚠️ No. Circuit boards are non-returnable once installed or powered on, per Balboa and industry standard policy. Electrical or physical damage from incorrect PCB selection voids the manufacturer’s warranty. Please verify compatibility carefully before purchase.

Q: What fuses are on the board? A: F6 — 30 A 250 VAC (P/N 30136); F4 & F5 — 1 A slo-blow (P/N 26983); F3 — 0.16 A slo-blow (P/N 26982). The 59187-03 revision upgraded the F3 fuse value and changed the heater from 800 Incoloy to 825 Incoloy.

👍 Why Choose the BP100G1

• ✅ Genuine Balboa Water Group OEM circuit board
• ✅ UL-listed system family (BP1-BP100G1-BU / BS / B)
• ✅ M7 dual-sensor heater safety architecture
• ✅ Integral or remote heater options (5.5 kW, 4.0 kW, or remote)
• ✅ Three factory Setup modes covering most 1-pump spa configurations
• ✅ Dual-voltage 120/240 VAC with auto 50/60 Hz detection
• ✅ Full Balboa topside family compatibility, from TP200 up through spaTouch™3
• ✅ Clim8zone™ heat-pump and CHROMAZON3™ lighting support on current production
• ✅ Programmable filtration, polling, freeze protection, and reminder system
• ✅ Expandable with the G1940 daughter board for a second pump

🛒 Why Buy From Parts4Tubs

• ✅ US-based company with local technical support
• ✅ Fast US shipping
• ✅ Expert advice from spa specialists — we’ll help you verify your existing BP100G1 configuration before you order
• ✅ Competitive pricing on genuine OEM Balboa parts
• ✅ Manufacturer warranty support (electrical or physical damage from incorrect installation voids warranty per Balboa)
• ✅ Matching M7 temperature sensor kits (30344KIT / 30382KIT), heater elements (58439R16 / 58506R16), fuses, and Balboa topside panels in stock
• ✅ Help with Setup selection, jumper configuration, and DIP-switch mapping

⭐ Summary

The Balboa BP100G1 is the current-production Mini+ platform main PCB for 1-pump hot tubs — covering integral-heater P/Ns 59187-03 (5.5 kW) and 59188-03 (4.0 kW) plus the remote-heater 59251-03 version. Dual-voltage (120/240 VAC), 50/60 Hz auto-detect, M7 dual-sensor safety, three factory Setup modes (2-speed + no circ, 1-speed + circ, or circ only), and full Balboa topside compatibility from TP200 through spaTouch™3. Supports Clim8zone™ heat-pump and CHROMAZON3™ lighting on current production. UL-listed, non-returnable — verify fit before purchase.