🛠️ HydroQuip® ECO-3 Replacement Circuit Board — 33-0024B-R4 — CS6200 / CS6230 / CS9200 / CS9230 Series

Genuine HydroQuip® ECO-3 replacement PCB manufactured by Gecko — for HydroQuip CS and ES 6200/6209, 9200, 4230, 6230, and 9230 Series spa control systems.

⚠️ IMPORTANT — PLEASE READ BEFORE ORDERING

• Confirm your system model before ordering. The 33-0024B-R4 is for HydroQuip ECO-3 Series systems — specifically the CS and ES 6200/6209, 9200, 4230, 6230, and 9230 Series. It is not compatible with ECO-2 systems (33-0024 series), ECO-2+2 systems (33-0024D-K), ECO-2/3 JST systems (33-0024E-K), or 240V systems.
• Verify chip number before ordering to replace 33-0024-U boards. The 33-0024-U is listed as a cross-reference with a mandatory chip number verification required. Do not assume the 33-0024B-R4 is a direct drop-in for a 33-0024-U board without first confirming the chip number matches.
• Temperature and hi-limit sensors are sold separately. This board does not include sensors.
• This is a 120V board only. Do not install in 240V systems.
• 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 circuit board (part number 33-0024B-R4) is the current replacement PCB for HydroQuip ECO-3 Series 120V spa control systems. The board is manufactured for HydroQuip by Gecko, carries chip number 491, and replaces all earlier ECO-3 board revisions including the original 33-0024B-K.

The ECO-3 is a more capable platform than the ECO-2, supporting a 2-speed primary pump, a 1-speed secondary pump, a blower, circulation pump, ozonator, and 12V spa light — all in a 120V configuration with individual outputs supporting either 120V or 240V accessories. Temperature and hi-limit sensors are not included and must be ordered separately. This board is compatible with ECO-3 Digital topside keypads only.

✨ Key Features

✅ Genuine HydroQuip® OEM replacement PCB — manufactured by Gecko for HydroQuip ECO-3 Series systems
✅ Part Number: 33-0024B-R4 (Chip Number: 491)
✅ Replaces all earlier ECO-3 revisions: 33-0024B-K, 33-0024B-R1, 33-0024B-R2, 33-0024B-R3
✅ 2-Speed Primary Pump — 120V/240V output
✅ 1-Speed Secondary Pump — 120V/240V output
✅ Blower output — 120V/240V
✅ Circulation Pump — 120V/240V
✅ Ozone/UV-C — 120V/240V
✅ 12V Spa Light
✅ Compatible with ECO-3 Digital topside keypads
✅ 120V board — standard US residential voltage
✅ Factory-new — never installed
✅ 1-year limited manufacturer’s warranty

⚠️ A/V (Stereo) is NOT supported on this board.

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

⚙️ Technical Specifications

Specification	Value
Part Number	33-0024B-R4
Chip Number	491
Board Series	HydroQuip ECO-3 Digital
Manufacturer	Gecko (manufactured for HydroQuip)
Compatible Systems	HydroQuip CS/ES 6200/6209, CS/ES 9200; CS/ES 4230, 6230, 9230 Series
Voltage	120V (60Hz)
Primary Pump (P1)	2-Speed, 120V/240V
Secondary Pump (P2)	1-Speed, 120V/240V
Blower	120V/240V
Circulation Pump	120V/240V
Ozone / UV-C	120V/240V
Spa Light	12V
A/V (Stereo)	Not supported
Compatible Keypad Type	ECO-3 Digital
Compatible Keypad PN	34-0197
Sensors Included	No — temperature and hi-limit sensors sold separately
Warranty	1-year limited manufacturer’s warranty
Returns	Non-returnable

🔄 Compatibility Guide

Compatible HydroQuip Control Systems:

System Model	Series Notes
CS6200	ECO-3 / 6200 Series
CS9200	ECO-3 / 9200 Series
ES6200	ECO-3 / 6200 Series
ES9200	ECO-3 / 9200 Series
CS6209	ECO-3 / 6200 Series
CS4230	ECO-3 / 4230 Series
CS6230	ECO-3 / 6230 Series
CS9230	ECO-3 / 9230 Series
ES4230	ECO-3 / 4230 Series
ES6230	ECO-3 / 6230 Series
ES9230	ECO-3 / 9230 Series

⚠️ Not compatible with: ECO-2 systems (33-0024 series) | ECO-2+2 systems (33-0024D-K, CS6220/9220) | ECO-2/3 JST systems (33-0024E-K, CS6330/9330) | 240V systems

Replaces These Part Numbers:

Part Number	Notes
33-0024B-K	Original ECO-3 board
33-0024B-R1	Earlier revision
33-0024B-R2	Earlier revision
33-0024B-R3	Earlier revision
33-0024-U	⚠️ Chip number MUST be verified before ordering — do not assume direct compatibility
3-60-0050	Cross-reference
0207-100001	Cross-reference
9203-002	Cross-reference
9203-10	Cross-reference

⚠️ 33-0024-U replacement requires chip number verification. Boards that look identical may be programmed differently. Always verify the chip number on the existing board before ordering.

Compatible Topside Keypads:

Part Number	Description
34-0197	ECO-3 Digital Topside Keypad

⚠️ This board requires an ECO-3 Digital topside. It is not compatible with ECO-2 topsides or other HydroQuip topside families.

🎛️ Board Functions

Pump Outputs:

Output	Configuration	Voltage Range
Pump 1 (Primary)	2-Speed	120V / 240V
Pump 2 (Secondary)	1-Speed	120V / 240V
Blower	1-Speed	120V / 240V
Circulation Pump	1-Speed	120V / 240V

Additional Outputs:

Function	Specification
Ozone / UV-C	120V / 240V
Spa Light	12V
A/V (Stereo)	Not supported

🔌 Installation Requirements

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

Pre-Installation Checklist:

• [ ] Confirm system is a HydroQuip ECO-3 Series (CS/ES 6200/6209/9200/4230/6230/9230)
• [ ] Confirm existing board chip number if replacing a 33-0024B-K, R1, R2, or R3 (standard drop-in)
• [ ] If replacing a 33-0024-U: verify chip number before proceeding — this is mandatory
• [ ] Confirm voltage is 120V — this board is NOT for 240V systems
• [ ] Confirm topside is ECO-3 Digital (PN 34-0197)
• [ ] Order temperature and hi-limit sensors separately if not already on hand
• [ ] Disconnect all power at GFCI breaker or service disconnect
• [ ] Photograph all wiring before removal

Electrical Requirements:

Requirement	Specification
Supply Voltage	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
• ⚠️ 120V only — do not install in 240V systems
• ⚠️ Sensors not included — do not operate without correctly installed temperature and hi-limit sensors
• ⚠️ 33-0024-U replacement requires chip number verification — boards may look identical but be programmed differently
• ⚠️ 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 (33-0024B-R4) and the ECO-2 (33-0024-R6)? A: The ECO-3 is a more capable platform than the ECO-2. The ECO-2 supports one primary pump output with an auxiliary. The ECO-3 supports a 2-speed primary pump, a 1-speed secondary pump, a blower, circulation pump, ozonator, and 12V light — all independently controlled. They are not interchangeable.

Q: Can I use this board to replace a 33-0024-U board in my spa? A: The 33-0024-U is listed as a possible cross-reference, but a mandatory chip number verification is required before ordering. Many boards look identical but have different firmware that only works with specific topside controls and components. Contact Parts4Tubs with your chip number 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 system.

Q: What topside panels work with this board? A: This board is compatible with the ECO-3 Digital topside (PN 34-0197). It is not compatible with ECO-2 topsides or other HydroQuip topside families.

Q: Is this a 120V or 240V board? A: This board is 120V only. If your system runs on 240V, this is not the correct board for your spa.

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 (33-0024B-R4)

✅ Genuine OEM replacement — manufactured by Gecko for HydroQuip ECO-3 Series systems
✅ More pump capability than ECO-2 — 2-speed P1 + 1-speed P2 + blower + circ pump
✅ Replaces all earlier ECO-3 revisions — 33-0024B-K through R3 are all covered
✅ Individual outputs configurable for 120V or 240V accessories
✅ Ozone/UV-C and circ pump outputs included
✅ Factory-new — never installed
✅ 1-year limited manufacturer’s warranty

🤝 Why Buy from Parts4Tubs

✅ Fast US shipping
✅ Compatible ECO-3 Digital topside available (34-0197)
✅ Sensor compatibility guidance available before order
✅ Competitive pricing
✅ Non-returnable boards — we help confirm compatibility before your order is placed

⭐ Summary

The HydroQuip® ECO-3 circuit board (33-0024B-R4) is the 120V replacement PCB for HydroQuip CS and ES 6200/6209, 9200, 4230, 6230, and 9230 Series spa control systems. Manufactured by Gecko for HydroQuip (chip 491), it replaces all earlier ECO-3 revisions including the original 33-0024B-K. It supports a 2-speed primary pump, 1-speed secondary pump, blower, circulation pump, ozonator, and 12V spa light — all configurable for 120V or 240V accessories. Compatible with ECO-3 Digital topside (34-0197) only. A/V is not supported. Temperature and hi-limit sensors are sold separately. If replacing a 33-0024-U board, chip number verification is mandatory before ordering. 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.