CodeFixJandy › AquaPure › 175

Jandy AquaPure Error 175

Sensor air lock or very low salt. Check sensor install and salt.

Either air is trapped at the flow sensor or salt is very low. Check the sensor install and test salt.

Start the fix →I just want the part ↓
Full answer & models

Jandy AquaPure service code 175 means a flow sensor air lock condition or very low salinity. Verify the flow/temp/salinity sensor installation, test salt independently, and add salt as needed.

Applies to: APUREMPLC700PLC1400AquaPure 700AquaPure 1400
Also searched as: AquaPure 175, flow sensor air lock, very low salinity

Pump off and pressure released before removing the cell. Goggles and gloves for acid.
Why
Turn the pump off and release filter pressure (open the filter air relief valve) before removing any component from the plumbing. Muriatic acid can cause serious injury: wear goggles and rubber gloves, work in a ventilated area, and always add acid to water.

What 175 means

Sensor air lock or very low salt. Check sensor install and salt.

More detail
Per Jandy manual H0325600, Section 7.2, code 175 indicates a flow sensor air lock condition or very low salinity. Corrective action: verify proper flow/temp/salinity sensor installation (Section 3, Figure 11); check salinity with a Myron L meter calibrated for NaCl or test strips; add salt as necessary (Sections 4.5 to 4.7). Level 2 code 182 (sensor sees less than 0.2 gpl, no salt, or air lock) generates 175.

5-minute checks

Fix it step by step

Step 1 of 3

  1. Test salt

    • 5 min
    • Salt test strips or NaCl meter
    • DIY

    Very low salt is one of the two listed causes.

    More detail

    Check salt independently.

    Jandy suggests a Myron L meter calibrated for NaCl, or test strips.

  2. Add salt correctly

    • 24 hr (mostly waiting)
    • Pool salt (99.8% NaCl), Pool brush
    • DIY

    Set production to 00%, broadcast salt around the perimeter, brush, and circulate 24 hours.

    More detail

    Add salt the way the manual describes.

    Section 4.7.4: run the pump, set CHLORINE PRODUCTION to 00%, use Table 2 for the amount, and broadcast salt around the outer perimeter or shallow end. Do not add salt through the skimmer, main drain, or surge tank. Brush and circulate 24 hours, verify the salt reading, then restore your production rate. Use 99.8% pure non-iodized NaCl. No rock salt, no calcium chloride, avoid anti-caking agents (YPS).

    Did the code clear?

  3. Verify sensor installation

    • 15 min
    • Manual H0325600
    • Caution

    Confirm the flow/temp/salinity sensor is installed as shown in Section 3, Figure 11.

    More detail

    Verify sensor installation.

    An improperly installed sensor can trap air. If you are unsure, have a pool professional verify the plumbing.

    Still showing 175?Still 175 → see the partNeed a pro → call a pro

Code cleared. Nice work.

Recheck chlorine in a week. Pros do the same.

Back to top

Fixed after any step? Recheck chlorine in a week. Still 175 after step 3? See the replacement part or call a pro.

Call a pro if…

  • Salt is in range and the installation matches the manual, but 175 persists.
  • You would need to re-plumb the sensor.

Part you'll likely need

As an Amazon Associate I earn from qualifying purchases. CodeFix earns a commission if you buy through these links, at no extra cost to you.

Use only the salt type the manual allows.

Pool salt, at least 99.8% pure sodium chloride (evaporated, food quality, non-iodized)

If the test shows very low salt, adding the correct salt is the fix.

Fits: Any salt chlorinator pool

Check it on Amazon

FAQ

What does AquaPure 175 mean?

Flow sensor air lock condition or very low salinity, per Jandy H0325600.

Where is this documented?

Jandy AquaPure/PureLink Power Center and Cell Kit, Installation and Operation Manual (H0325600), Section 7.2 Service Codes, Section 4.7 Salt, Section 6.3 Electrolytic Cell Cleaning.

Source: Jandy AquaPure/PureLink Power Center and Cell Kit, Installation and Operation Manual (H0325600), Section 7.2 Service Codes, Section 4.7 Salt, Section 6.3 Electrolytic Cell Cleaning. Written by a Florida pool service owner. Updated 2026-10-15.