Jandy AquaPure High Salt Level: Service Code 145

What Code 145 Means

When the flow/temp/salinity sensor detects salt concentration above 4.0 gpl, the control board generates code 145 and shuts off the electrolytic cell. This is a critical protection because high salt concentration can damage the power center's internal electronics and, at extreme levels (above 6.0 gpl), cause corrosion damage to pool fixtures, ladders, and heater components.

If the salinity exceeds the sensor's maximum measurement range (approximately 4.5-6.5 gpl depending on water temperature), the display will show "HH" instead of a numeric value.

Common Causes of High Salt

• Over-salting: Adding too much salt during initial setup or top-off without measuring first.
• Evaporation without dilution: In arid climates, water evaporates but salt stays behind, gradually concentrating.
• Not checking salinity before adding salt: Always press the SALINITY button and verify independently before adding any salt.

How to Lower Salt Level

1. If you have a DE filter, backwash it first. The water lost during backwash removes salt.
2. Partially drain the pool. Use the waste setting on a multiport valve or a submersible pump. Drain approximately 10-20% of the pool volume at a time.
3. Refill with fresh water from your garden hose or fill source.
4. Run the pump for several hours to mix thoroughly.
5. Test salinity by pressing the SALINITY button (C). Press 2-3 times until the reading stabilizes.
6. If still above 3.5 gpl, repeat the drain-and-refill cycle.
7. Target a final reading of 3.0-3.5 gpl.

How to Prevent Code 145

• Always check salinity before adding salt. Press the SALINITY button and verify with an independent test.
• Use a salt calculator to determine the exact amount needed based on your pool volume and current salt level.
• Add salt gradually. It is easier to add more than to remove excess.
• In arid climates with high evaporation, top off with fresh water regularly to prevent salt concentration from creeping up.