Water at the sensor above 108°F (42°C). Reduce water temperature.
The sensor reads water above 108°F. Lower the water temperature.
Jandy AquaPure service code 174 means pool temperature is too high for operation: the flow/salinity sensor reads water above 108°F (42°C). Reduce the water temperature.
Water at the sensor above 108°F (42°C). Reduce water temperature.
Confirm whether the water is actually above 108°F (42°C).
Measure water temperature.
The code is based on the flow/salinity sensor's reading.
Lower heater settings and let the water cool.
Reduce water temperature.
Jandy's corrective action is to reduce water temperature.
If water is cool and 174 persists, have a pool professional check the sensor.
Contact a pool professional.
A normal water temperature with 174 suggests a sensor problem; the manual does not list an owner repair for the sensor.
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An independent salt reading is the first check.
No part is needed for 174 when the water is genuinely hot.
Above 108°F (42°C) at the flow/salinity sensor, per Jandy H0325600.
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.