Zodiac LM2/LM3 S16 Pump PCB W222131 - Spare Part

Zodiac LM2 / LM3 S16 Pump PCB — Part W222131 (Replaced by R0794400)

The Zodiac LM2/LM3 S16 Pump PCB is a genuine factory replacement part for Zodiac LM2 and LM3 salt chlorinators. Originally supplied as part number W222131, this part has been superseded by R0794400 — both numbers refer to the same component.

Pool Shop Australia is an authorised Zodiac Titanium dealer, supplying genuine Zodiac parts. This PCB is typically a stock item and is referenced as Part 7 in the Zodiac LM3 parts diagram.

Part Details

• Genuine Zodiac factory part
• Compatible with: Zodiac LM2 and LM3 chlorinators
• Original part number: W222131
• Superseded by: R0794400
• Position: Part 7 in the LM3 parts diagram
• Barcode: 9317545004433

Frequently Asked Questions

What does the Zodiac LM3 Pump PCB do?

The Pump PCB (printed circuit board) controls the pump output function of the Zodiac LM2/LM3 chlorinator power pack. A faulty pump PCB can cause the chlorinator to stop producing chlorine or display error codes related to pump operation.

What is the difference between W222131 and R0794400?

W222131 is the original Zodiac part number for the LM2/LM3 S16 Pump PCB. R0794400 is the current superseding part number. They are the same component — if you search for either number, this is the correct part.

Is this a genuine Zodiac part?

Yes. Pool Shop Australia is an authorised Zodiac Titanium dealer and supplies only genuine Zodiac factory parts.

Will this PCB fit both the LM2 and LM3 chlorinator?

Yes, this pump PCB is compatible with both the Zodiac LM2 and LM3 chlorinator models.

Do I need a new chlorinator or just the PCB?

In many cases, replacing the pump PCB restores full chlorinator function without the need for a full unit replacement. If you’re unsure, we also stock complete Zodiac LM3 chlorinators which can be installed without plumbing changes.