Interactive diagnostic wizard for Jandy AquaPure salt chlorination system error codes including 120-123, 125, 144, 145, 172/175, and 126/127/173.
Select the symptom or error code your AquaPure is displaying to get step-by-step troubleshooting guidance.
Click a symptom or error code to see diagnostic steps.
This interactive troubleshooting wizard is designed specifically for the Jandy AquaPure salt chlorination system. Whether you are a pool homeowner trying to decode an error code on your AquaPure display or a service technician running a structured diagnostic, the wizard adapts to your role and provides the appropriate level of guidance.
Select the "Homeowner" role for safe, practical checks you can perform yourself, or switch to "Technician" mode for detailed diagnostic procedures including cell current measurements, voltage checks, and flow sensor testing. Each symptom card links to a comprehensive written guide when you need to go deeper.
The table below summarizes the most common Jandy AquaPure error codes and their meanings. Click the troubleshooter above for step-by-step diagnosis of each code.
| Error Code | Description |
|---|---|
| 120-123 | Low Chlorine Output — cell not producing enough chlorine; check salt level and output percentage |
| 125 | Cell Needs Cleaning — scale buildup detected on cell plates reducing chlorine generation efficiency |
| 144 | Low Salt — salt level reading below 2.0 gpl; add pool-grade salt and circulate |
| 145 | High Salt — salt level reading above 4.0 gpl; partially drain and refill with fresh water |
| 172 / 175 | Flow Sensor Failure — no water flow detected by the flow sensor; check pump operation and sensor wiring |
| 126 / 127 / 173 | Low Voltage — insufficient power reaching the AquaPure unit; check breaker, wiring, and connections |
For a complete walkthrough of every AquaPure error code with photos and diagrams, see the full Jandy AquaPure troubleshooting guide.
Turn off the pump, remove the cell from the housing, and visually inspect for white calcium scale on the plates. If scale is present, soak the cell in a 4:1 water-to-muriatic acid solution for 5 to 10 minutes. Rinse thoroughly before reinstalling. Regular cleaning extends cell life and maintains chlorine output. Keep your pH and calcium hardness in range to reduce future scaling.
Error code 144 means the AquaPure has detected a low salt level, below 2.0 gpl (grams per liter). Add pool-grade salt to raise the level into the 2700-3400 ppm operating range, circulate for 24 hours, then retest with an independent drop kit or digital meter. If the reading still shows low after adding salt, the cell may need cleaning, as scale buildup can cause false low readings.
Error code 145 indicates the salt level is above 4.0 gpl, which is too high for the system to operate safely. The most common fix is to partially drain the pool and refill with fresh water. Wait 24 hours after the water change before retesting, and do not add more salt until the level drops to the normal 2700-3400 ppm range.
Error codes 172 and 175 indicate the flow sensor is not detecting water movement. First, confirm the pump is running and all valves are open. If the pump is running normally, the flow sensor itself may need cleaning or replacement. A technician can check the sensor wiring, bleed any air locks from the system, and verify the minimum flow rate is being met.
A Jandy AquaPure salt cell typically lasts 3 to 5 years depending on usage, water chemistry, and maintenance. Regular cleaning and keeping your pH and calcium hardness in range will maximize cell life. When the cell is near end of life, you will notice declining chlorine output even after cleaning, and the system may display persistent error codes.
Yes. Select the "Homeowner" role and the wizard will show only the checks that are safe and practical for a non-professional to perform. Technician-level steps such as cell current measurements and voltage testing are hidden unless you switch to Technician mode. Always follow the safety warnings on screen, and consult a licensed pool service professional for any repair you are not comfortable performing.
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