Poolex Temperature Measurement Instability

Poolex pool heater display shows erratic or fluctuating water temperature readings.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Loose water inlet or outlet sensor, Sensor cable interference from power wires, Failing NTC sensor, Poor grounding of Poolex control system

Safety: Isolate power before handling sensors.

Steps:

Check sensor mounting: Ensure inlet and outlet sensors are firmly attached and in good thermal contact with the pipe or manifold.
Inspect wiring route: Keep sensor cables away from high-voltage and compressor cables to reduce electrical noise.
Compare with external thermometer: If readings are unstable and inaccurate, replace the suspect Poolex NTC sensor.

Medium 3/5

Water Inlet Temperature Sensor (NTC)

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