Jandy AquaLink TCX

The AquaLink TCX is Jandy's smallest automation system. It's built to replace a mechanical timer on a pool with no spa. There's a board with one relay and a few low-voltage terminals, and a separate command hub with two antennas that connects it to the iAquaLink app.

It comes two ways. The TCXP has its own metal enclosure. The TCXPCONV conversion kit goes inside the Intermatic timer box that's already on the wall, in place of the clock.

One relay, and what takes it

Jandy's automation selection guide puts the whole system in one line of its table. With a variable-speed pump, it runs the pump, a heater and one auxiliary. With a single-speed pump, it runs the pump, a heater and nothing else.

The difference is the relay. There's only one, rated 25 A: 3 HP at 240 V, 1½ HP at 120 V, or 1,500 W of incandescent lighting.

• A single-speed pump takes it. The manual has the filter pump's breaker power the TCX, and says the relay can't be set up for anything else.
• A Jandy variable-speed pump frees it. The pump is wired "hot," straight from its breaker, and the TCX runs it over RS-485. The relay is then free for a light, a water feature pump, a booster pump, a solar pump or a salt chlorinator. For a salt chlorinator, the manual puts the pump on the line side of the relay and the chlorinator on the load side.
• The heater doesn't use the relay. Every setup in the selection guide includes a heater, even the single-speed one with no auxiliaries left. The board has a separate low-voltage pair labeled LVH on its green ten-pin terminal strip. Jandy's TCX documents don't spell the letters out.
• One valve actuator at most. Jandy's product page and the selection guide both say none is included and one is the maximum.

The strip is in pairs: 1 and 2 for LVH, then solar, water, air and a spare. The manual puts the air sensor's black wire on 7 and its red wire on 8.

Why it can't run a pool and spa

The selection guide's footnote says the TCX is for pool automation only, with no spa. The 2026 catalog calls the TCXP a pool only bundle. Jandy's product page is looser: its spec line says pool or spa only. All three mean one body of water.

The valve count makes the same point. The AquaLink RS boards for a pool and spa on shared equipment come with two valve actuators, and the TCX takes one at most. For a pool with an attached spa, the RS is the Jandy system to look at.

One variable-speed pump

Jandy's pump manuals are specific. The manual for the VS PlusHP and the one for the VS FloPro both say the TCX supports a single variable-speed pump. DIP switches 3 and 4 on the pump have to be off, even when it's connected through the pass-through wiring on a SpeedSet controller. Jandy's other systems take up to four.

The sell sheet says it supports all Jandy equipment and other major manufacturers' equipment. None of the TCX documents names another brand's variable-speed pump it can run by speed. The relay can switch any pump within its rating on and off, but that's all it does.

For salt, the selection guide marks three Jandy chlorinator lines as working with the TCX: the AquaPure, the Fusion Soft and the TruClear. The catalog lists two RS-485 ports on the board, and the command hub uses one of them. Jandy's TCX documents don't say how a pump and a salt chlorinator share the other.

Lights through a wireless wall switch

The TCX doesn't run the pool light from the pad. Jandy's answer is a wireless light switch, WLS4INF, that goes in the house. The sell sheet's point is that the light's wiring doesn't have to be rerouted to the automation system. The manual says to pair it through the app.

The selection guide checks "color light control," but none of the TCX documents explains how it handles color shows. One thing is clear. Jandy's Infinite WaterColors lights say on the cover of their controller's manual that they need an AquaLink RS at revision Y or later. They aren't a TCX light.

The TCXP includes the switch. For the conversion kit, the documents disagree:

• The 2020 manual's package list includes the wireless light switch and wall plate. It says only the enclosure is TCXP-only.
• The 2026 catalog's list for the conversion kit leaves the switch out, and Jandy's conversion kit page offers it as an accessory.

If the switch is part of why you're buying the kit, check the box before the installer leaves.

The conversion kit goes in the timer box

This is the TCX's best trick. The installer pulls the clock mechanism out of the Intermatic box, lowers the TCX chassis in under the retainer ears, and pushes it down until it locks under the mounting tab. If the box has no spring clip, a retention screw holds it.

Which boxes it fits is another disagreement:

• The manual names two Intermatic metal enclosures, the T104R and the T30004R.
• The 2026 catalog lists seven: the T104, the T3000R5 series, the T40000R series, the 2T511GA, 2T2331GA and 2T2485GA, and the T10000R family.

If your box is on the catalog's list but not the manual's, ask the dealer before you buy.

The old box also has to be sound. The manual says the seals and gaskets have to be in place and working, the door hinges and locks have to work, the grounding lug has to be present and bonded, and corrosion can't be letting weather in. Otherwise, it needs a new enclosure.

Where the command hub goes

The hub is the part that talks to the internet, and Jandy's hub sheet gives it a list of rules:

• As close to the home's router as possible. Line of sight isn't required.
• At least 10 feet from any high-voltage electric motor.
• At least 5 feet from other transceivers.
• Mounted flat, with the antennas pointing up.
• Away from steel framing, aluminum siding, wrought iron, chain-link fencing, leaded glass and other 2.4 GHz devices.

Check the Wi-Fi signal at the spot first. The sheet suggests a bandwidth test app on your phone. If the signal is weak, it suggests a Wi-Fi extender, a power line adapter or an Ethernet cable. The hub has an Ethernet port, but you have to set the toggle switch inside it to WIRED. Ethernet doesn't power the hub.

The same sheet also says, in its wiring note, that the hub should be near the equipment on the pool pad. On a small pad, that and the 10-foot rule pull against each other. The hub connects to the board by an RS-485 cable, and high and low voltage wiring must never share a conduit.

When the internet is down

The sell sheet says the hub connects to a phone over Bluetooth, so you still have control during an internet outage.

Freeze protection is where it differs most from Pentair's IntelliConnect, which gets its temperature from an internet weather service. The TCX has its own air sensor. The hub sheet says the hub has one built in. The power center manual has you wire an air sensor to terminals 7 and 8, somewhere it reads outdoor air, out of direct sun, and says not to splice its wire.

Jandy's selection guide checks freeze protection for the TCX. But none of the TCX documents gives the temperature it starts at, or says what it runs, so ask the installer to show you.

The water sensor is another place the documents disagree. The 2026 catalog lists air and water sensors in both kits. The 2020 manual's package list names only an air sensor. The board has a WATER pair either way.

Reading the command hub

The hub's lights are explained on the inside of its cover, and they tell you where a problem is.

• SVC button, Auto (green). It runs the schedules you've set.
• Quick Clean (green). The filter pump runs for 30 minutes at its set maximum speed.
• Service (red). The hub has control, and the app and other remote interfaces are locked out.
• Time Out (blinking amber). Service mode lasts three hours by default, then it goes back to Auto.
• Filter pump (blue). Lit when the pump is running in pool circulation, off when the pump is off.
• LAN (amber). Solid when the hub is connected to the home router.
• WEB (green). Solid when it's connected to the iAquaLink servers.
• Bluetooth to phone (blue). A direct connection to a phone.

So if LAN is on and WEB is off, the hub has reached your router but not Jandy's servers. That's a router or internet problem, not a hub problem.

Setting it up

The TCX needs the iAquaLink app for setup and programming. In the app, you sign in or create an account, tap the plus sign to add a system, choose AquaLink TCX and follow the prompts. Have the router's name and password ready, and remember the password is case-sensitive.

There's an invite code on a door hanger. The hub sheet says it's for the homeowner, and the installer doesn't need it. Jandy's product page says firmware updates come over the air, free.

Installation rules from the manual

• The power center goes near the equipment pad, at least 2 feet above the ground and at least 5 feet from the inside edge of the pool in the US, or 3 meters in Canada.
• It isn't service equipment, so it needs a disconnect or breaker upstream.
• A ground-fault circuit interrupter is required if it controls underwater lights.
• Line voltage wire is 12 AWG minimum. The communication cable is four-conductor, 22 AWG minimum, in red, black, yellow and green.
• High and low voltage wiring stay separated, in corrugated tubing.
• Bond it with solid copper, 8 AWG minimum (6 AWG in Canada). The lug goes no higher than 2 inches from the bottom of the enclosure, and the installer checks ground continuity with a meter. The manual says skipping the bond may void the warranty.
• Only use it to control a packaged heater with its own operating and high-limit controls. The manual says it isn't a safety limit control.

Warranty

Jandy's limited warranty gives the TCX one year from retail purchase. Automation isn't one of the exceptions that get longer. Purchased replacement parts get ninety days, and the warranty doesn't pay for labor.

It also doesn't apply to Jandy products bought through the Internet or an e-commerce platform, except valves under 3 inches, parts and accessories. And it requires installation by a licensed contractor where your area licenses them.

Parts

Fluidra's 2026 catalog has a replacement parts table for the TCXP and TCXPCONV on page 163. It lists the dead panel (R0807500), the power interface board with chassis (R0807301), the screw and fuse package (R0807600), the metal enclosure (R0807400), the command hub (TCXCHP) and the wireless light switch (WLS4INF). The hub sheet adds three hub parts: the cover (R0788200), the V-mount bracket (R0788300) and the access door (R0789700).

The catalog's temperature sensor kits and its valve actuator, 4424, carry only the AquaLink RS and PDA marks, not the TCX. The TCX parts table has no sensor part number, so ask a dealer before you order one.