HydroQuip® ECO-3+2 Replacement Circuit Board — 33-0024E-K — CS6330 / CS9330 / PS6603 Series

📥 Downloads and Resources

📄 HydroQuip 2026 product catalogue (PDF) — this model is on page 50

⚠️ HydroQuip’s own note on these boards: “PC Boards appear physically identical. Only difference is software and/or transformer.” So match the part number, not the look of the board.

🎛️ HydroQuip® ECO-3+2 Replacement Circuit Board — 33-0024E-K — CS6330 / CS9330 / PS6603 Series

Genuine HydroQuip® ECO-3+2 replacement PCB manufactured by Gecko — for HydroQuip CS and ES 6330, 9330, and PS6603 Series spa control systems.

⚠️ IMPORTANT — PLEASE READ BEFORE ORDERING

• This is the ECO-3+2 — confirm your system series before ordering. The 33-0024E-K is for CS/ES 6330, 9330, and PS6603 Series systems only. It is not compatible with ECO-2 (CS6200/9200), ECO-2+2 (CS6220/9220), or ECO-3 (CS6230/9230) systems.
• Connector type: JST Cable. Confirm your system uses JST cable connectors before ordering.
• Temperature and hi-limit sensors sold separately. This board does not include sensors.
• Non-returnable. Circuit boards cannot be resold once purchased. Confirm compatibility before ordering. Damage from incorrect installation is not covered under warranty.

🔌 Product Overview

The HydroQuip® ECO-3+2 circuit board (part number 33-0024E-K) is the replacement PCB for HydroQuip CS and ES 6330, 9330, and PS6603 Series spa control systems. Manufactured for HydroQuip by Gecko, it is also described as “PCB: Digital STD / SSPA” and uses a JST cable connector system.

The ECO-3+2 is the most full-featured board in the HydroQuip ECO digital series. It supports two pump outputs, an ozonator, spa light, blower, and circulation pump — making it suitable for mid-to-high-range portable spa configurations with dual pumps and full accessory management. Temperature and hi-limit sensors are not included and must be ordered separately.

✨ Key Features

✅ Genuine HydroQuip® OEM replacement PCB — manufactured by Gecko for ECO-3+2 Series
✅ Part Number: 33-0024E-K (also: 33-0024E)
✅ For HydroQuip CS/ES 6330, 9330, and PS6603 Series systems
✅ Pump 1 (P1) output
✅ Pump 2 (P2) output
✅ Ozonator (OZ) output
✅ Spa Light (LT) output
✅ Blower (BL) output
✅ Circulation Pump (CIRC) output
✅ JST cable connector
✅ 115V/120V — standard US residential voltage
✅ Compatible with HydroQuip Eco 3 6-button topside controls
✅ Factory-new — never installed
✅ 1-year limited manufacturer’s warranty

⚠️ Temperature and hi-limit sensors sold separately — not included.

⚙️ Technical Specifications

Specification	Value
Part Number	33-0024E-K (also: 33-0024E)
Board Series	HydroQuip ECO-3+2 Digital
Description	PCB: Digital STD / SSPA 120V
Manufacturer	Gecko (manufactured for HydroQuip)
Compatible Systems	HydroQuip CS/ES 6330, 9330, PS6603 Series
Voltage	115V / 120V (60Hz)
Pump 1 (P1)	Supported
Pump 2 (P2)	Supported
Ozonator (OZ)	Supported
Spa Light (LT)	Supported
Blower (BL)	Supported
Circulation Pump (CIRC)	Supported
Connector Type	JST Cable
Sensors Included	No — temperature and hi-limit sensors sold separately
Board Type	New (factory replacement)
Warranty	1-year limited manufacturer’s warranty
Returns	Non-returnable

🔧 Parts and fittings for this

🔗 Compatibility Guide

Compatible HydroQuip Control Systems:

System	Series
CS6330	ECO-3+2 / 6330 Series
ES6330	ECO-3+2 / 6330 Series
CS9330	ECO-3+2 / 9330 Series
ES9330	ECO-3+2 / 9330 Series
CS6603	ECO-3+2 / PS6603 Series
PS6603	ECO-3+2 / PS6603 Series

⚠️ Not compatible with: CS6200/9200 (ECO-2 — 33-0024-R6) | CS6220/9220 (ECO-2+2 — 33-0024D-K) | CS6230/9230 (ECO-3 — 33-0024B-R4)

Replaces These Part Numbers:

Part Number	Notes
33-0024E	Original ECO-3+2 board
33-0024E-K	Kit variant (same product)
9203-005	Cross-reference
389296	Cross-reference

Compatible Topside Spaside Controls:

Part Number	Description
58-355-4110	Topside, HydroQuip Eco 3, 6 Button, P1/P2/Lt, Large Rec, 10ft Cord
58-355-4112	Topside, HydroQuip Eco 3, 6 Button, P1/P2/Lt, Large Rec, 25ft Cord

🔄 ECO-3+2 in the HydroQuip ECO Family

Board	Part Number	Systems	P1	P2	Blower	Circ	OZ
ECO-2	33-0024-R6	CS6200/9200	1-spd	—	—	—	—
ECO-2+2	33-0024D-K	CS6220/9220	2-spd	2-spd	—	—	—
ECO-3	33-0024B-R4	CS6230/9230	2-spd	1-spd	✅	✅	✅
ECO-3+2	33-0024E-K	CS6330/9330	✅	✅	✅	✅	✅

The ECO-3+2 supports the full range of outputs including both pumps, ozonator, light, blower, and circulation pump.

🛠️ Installation Requirements

⚠️ Installation must be performed by a licensed electrician in compliance with NEC and all applicable local codes.

Pre-Installation Checklist:

• [ ] Confirm system model is CS/ES 6330, 9330, or PS6603
• [ ] Confirm JST cable connector on existing system
• [ ] Confirm voltage is 115V/120V
• [ ] Order temperature and hi-limit sensors separately if needed
• [ ] Disconnect all power at GFCI breaker or service disconnect
• [ ] Photograph all wiring before removal

Electrical Requirements:

Requirement	Specification
Supply Voltage	115V / 120V / 60Hz
GFCI	Class A GFCI required — NEC Article 680
Ground & Bonding	Required — NEC Article 680
Dedicated Circuit	Required
Disconnect Box	Within line of sight of spa, at least 5 ft away
Wire Type	Copper conductors only

⚠️ Safety Warnings

• ⚠️ ALWAYS disconnect all power before circuit board work
• ⚠️ Licensed electrician installation required; NEC Article 680 compliance mandatory
• ⚠️ GFCI required; grounding and bonding required per NEC Article 680
• ⚠️ 115V/120V only — do not install in 240V systems
• ⚠️ Confirm system is 6330/9330/PS6603 series — not compatible with ECO-2, ECO-2+2, or ECO-3 systems
• ⚠️ Sensors not included — do not operate without correctly installed temperature and hi-limit sensors
• ⚠️ Damage from incorrect installation is NOT covered under warranty
• ⚠️ Non-returnable — verify compatibility before ordering

❓ Frequently Asked Questions

Q: What is the difference between the ECO-3 and the ECO-3+2? A: The ECO-3 (33-0024B-R4) supports CS6230/9230 Series systems with a 2-speed P1, 1-speed P2, blower, and circ pump. The ECO-3+2 (33-0024E-K) is for CS6330/9330/PS6603 Series and adds ozonator and spa light outputs in addition to the full pump and blower complement. They are not interchangeable — confirm your system series before ordering.

Q: What connector does this board use? A: JST Cable. Confirm your existing system uses JST connectors before ordering.

Q: Are sensors included? A: No. Temperature and hi-limit sensors must be ordered separately. Contact Parts4Tubs to confirm the correct sensor part numbers for your specific 6330/9330/PS6603 system.

Q: Which topsides work with this board? A: The compatible spaside controls confirmed for this board are the HydroQuip Eco 3 6-button panels: 58-355-4110 (10ft cord) and 58-355-4112 (25ft cord), both with P1, P2, and Light button configurations.

Q: What warranty is included? A: 1-year limited manufacturer’s warranty. Damage from incorrect installation is not covered. Circuit boards are non-returnable.

✅ Why Choose the HydroQuip® ECO-3+2 (33-0024E-K)

✅ Genuine HydroQuip® OEM PCB — manufactured by Gecko for 6330/9330/PS6603 Series
✅ Full output capability — P1, P2, ozone, light, blower, and circ pump all supported
✅ JST cable connector — designed for ECO-3+2 control box wiring
✅ Factory-new — never installed
✅ 1-year limited manufacturer’s warranty

🤝 Why Buy from Parts4Tubs

✅ Fast US shipping
✅ Compatible ECO-3 topsides available (58-355-4110 / 58-355-4112)
✅ Sensor compatibility guidance available
✅ Competitive pricing

💡 Summary

The HydroQuip® ECO-3+2 circuit board (33-0024E-K) is the 115V/120V JST-cable replacement PCB for HydroQuip CS and ES 6330, 9330, and PS6603 Series spa control systems. Manufactured by Gecko for HydroQuip, it supports two pump outputs, ozonator, spa light, blower, and circulation pump — making it the most full-featured board in the HydroQuip ECO digital series. Compatible spaside topsides: HydroQuip Eco 3 6-button panels (58-355-4110 and 58-355-4112). Temperature and hi-limit sensors sold separately. Non-returnable; 1-year manufacturer’s warranty; damage from incorrect installation not covered.

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.