E17
Ariston
Discharge Pipe Temperature Sensor Fault
Unit displays E17; sometimes associated with poor cooling and frequent stops.
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Safety Warning
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.
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Possible Causes
Faulty compressor discharge NTC sensor, Sensor detached from discharge pipe, Damaged sensor wiring, Faulty outdoor PCB sensor circuit
How to Fix / Troubleshooting
Safety first: Turn off power and allow the outdoor unit to cool before touching any pipes; discharge line can be very hot.
- Step 1 – Locate discharge sensor: On the outdoor unit, find the sensor clipped to the small-diameter hot gas pipe leaving the compressor.
- Step 2 – Check attachment: Ensure the sensor is firmly in contact with the pipe and secured with the original clip or clamp.
- Step 3 – Inspect wiring: Follow the sensor cable to the PCB, checking for cuts or loose connectors. Reseat the connector.
- Step 4 – Replace sensor: If the sensor body is cracked or cable damaged, replace with the correct Ariston discharge NTC sensor.
- Step 5 – PCB diagnosis: If E17 persists with a new sensor, the outdoor PCB sensor input may be defective and should be replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Compressor Discharge Temperature Sensor (NTC)
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