Jandy TruClear Cell Replacement: End-of-Life Signs, Lifespan, and Procedure

Signs the Cell Has Reached End of Life

Salt cell plates are coated with a specialized coating that enables the electrolysis process. Over time, this coating wears away through normal use, acid washing, and water chemistry exposure. When the coating is depleted, the cell can no longer efficiently convert salt to chlorine.

Definitive end-of-life indicators

• "Check Cell" display that persists: The system detects either a short circuit/overload or an open circuit/disconnection. After cleaning the cell and verifying the cable connection, if "Check Cell" returns, the cell is likely done. The system retries every 30 seconds on open circuit faults.
• Persistent codes after cleaning: If recurring low-current codes persist after thorough cleaning, the cell has likely reached end of life and should be replaced.
• Plates loose and touching: If the plates have warped or come loose and are making contact with each other, replace the cell. This causes short circuits.
• No chlorine production at 100% output: With correct salt (3,000 ppm), proper flow, and extended run time, if the cell produces no measurable chlorine, the cell has reached end of life.
• No foaming during acid wash: When you clean the cell with diluted muriatic acid and see no foaming reaction at all (no scale to remove), but output remains low, the problem is the cell itself, not scale.

Conditions that shorten cell life

• Chronically low salt: Operating below 2,500 ppm forces the cell to work harder and causes premature coating failure.
• Poor pH control: Low pH accelerates wear on the cell. Maintain pH within the recommended 7.4-7.6 range. pH above 7.6 causes scale that requires more frequent acid cleaning.
• Excessive acid washing: Excessive acid washing can shorten cell life. Only clean when inspection confirms scale buildup.
• High calcium hardness: Above 400 ppm accelerates scaling and the need for more frequent cleaning.
• Cold water operation: Running the cell below 55°F (13°C) dramatically shortens cell life per the manual.
• Oversized pool: Running at 100% output continuously on a pool near the 35,000-gallon maximum wears the cell faster.

Before You Replace: Rule These Out First

1. Clean the cell. A heavily scaled cell can trigger "Check Cell" or produce no chlorine. Follow the acid wash procedure and retest.
2. Check the cable connection. Unplug the cell cable from the power pack and reconnect firmly. Inspect for corrosion or damage.
3. Verify salt level. Test independently at 3,000 ppm. Low salt causes low output that mimics a bad cell.
4. Look for debris between plates. Use a garden hose to flush any material lodged between the plates.
5. Check for metal debris causing shorts. If metal has fallen between the plates, it can cause a "Check Cell" reading. Remove it carefully (no metal tools).
6. Check the PCB. If the cell tests good visually but "Check Cell" persists, the issue may be the power pack circuit board (PCB), not the cell. The replacement PCB assembly is R0802300.

Replacement Parts

Part	Part Number	Description
TruClear Cell (replacement, no housing)	R0693900	The cell insert that slides into the existing housing. This is what you replace in most cases.
TruClear Housing (replacement, no cell)	R0694000	The pipe-mounted housing only. Replace if the housing is cracked or damaged.
TruClear O-Ring	R0694100	Replacement O-ring for the cell housing seal. Replace if leaking.
O-Ring Tail Piece	R0449200	Tail piece O-ring for union connections (retrofit installations).
Power Pack	R0802200	Complete power pack replacement if the controller has failed.
PCB Assembly	R0802300	Replacement circuit board for the power pack.
Winterizing Cap	R0621900	Cap that replaces the cell during winterizing or maintenance.

Cell Replacement Procedure

1. Shut down the system

1. Turn off all power at the circuit breaker.
2. Close any necessary valves to prevent water loss.
3. Open the air relief valve on the filter to release system pressure.

2. Remove the old cell

1. Disconnect the cell cable from the power pack.
2. Loosen the lock ring on the cell housing.
3. Lift the old cell out of the housing. Note the orientation.

3. Inspect the housing

1. Check the housing for cracks, damage, or excessive wear.
2. Inspect the O-ring seat. Replace the O-ring (R0694100) if it is worn, compressed, or cracked.
3. Clean any debris from inside the housing.

4. Install the new cell

1. Insert the new cell into the housing. Ensure the flow indication arrows on the transparent lid correspond to the arrows on the cell housing.
2. Engage the lock ring securely.
3. Reconnect the cell cable to the power pack. Ensure it is fully seated.

5. Restart and verify

1. Open valves and restore water flow.
2. Restore power at the circuit breaker.
3. The display should show "Starting..." and then "Chlorinating" with your set output percentage.
4. Check for leaks around the cell housing and lock ring.
5. Monitor chlorine levels over the next 24–48 hours to confirm normal production.

Tracking Cell Life with the Service Menu

The TruClear service menu includes a day counter that tracks operational days. Access it by pressing and holding the up and down arrows simultaneously for five seconds. The display will show something like "Cyc 5h Days=0000." The "Days" value tells you how many days the cell has been in operation. This can help you track cell age and plan proactive replacement before failure.

How to Maximize Cell Lifespan

• Maintain 3,000 ppm salt. Never let it drop below 2,500 ppm.
• Keep pH at 7.4–7.6. This is the single most important factor for cell longevity.
• Use the right polarity reversal setting. Switch to 3-hour cycles in hard water areas (TH above 400 ppm).
• Only clean when necessary. Monthly visual inspection is recommended, but only acid wash when the light test shows heavy scale.
• Winterize properly. Remove the cell, clean it, and store indoors when water temperature will be below 55°F (13°C) for extended periods. Use a winterizing cap (R0621900) to maintain water circulation.
• Keep calcium hardness at 200–400 ppm. Test monthly and dilute if above 400 ppm.
• Do not over-size the cell's workload. Running at 100% constantly on a 35,000-gallon pool wears the cell faster than running at 60% on a 20,000-gallon pool.