Ariston Washing Machine Error F03

⚡ Quick Answer: The Ariston washing machine F03 error indicates a malfunction related to the temperature sensor, specifically the thermistor, which may not be accurat... ✅ DIY Fixable

What Does Error F03 Mean?

The Ariston washing machine F03 error indicates a malfunction related to the temperature sensor, specifically the thermistor, which may not be accurately sensing or regulating water temperature during the wash cycle. This issue often prevents the machine from heating water to the selected temperature, leading to incomplete or prematurely halted wash cycles. The error may be accompanied by the F03 code displayed on the panel or an LED blink pattern, especially when the machine is expected to heat water.

Common Symptoms:

  • Error F03 displayed on the panel or via LED blink pattern during wash, especially when heating water is expected.
  • Water does not heat to the selected temperature during cycle.
  • Cycle may stop or pause prematurely due to inability to reach temperature setpoint.

Possible Causes

  • Faulty wash temperature sensor (thermistor) open circuit (high)
  • Faulty temperature sensor wiring / connector (medium)
  • Stuck heater relay affecting sensor circuit (medium)

How to Fix Error F03

DIY Fix Basic checks and reset

  1. Turn off and unplug the washing machine.
  2. Wait 10–15 minutes to allow capacitive discharge.
  3. Plug the machine back in and restart the selected wash cycle to see if F03 clears.

Technician Only Inspect and test temperature sensor circuit

  1. Disconnect power to the machine.
  2. Access the wash temperature sensor (NTC thermistor) inside the machine.
  3. Measure sensor resistance at room and elevated temperatures to verify against manufacturer specs.
  4. Check wiring harness and connectors for continuity, corrosion, or damage.
  5. Replace the sensor or repair wiring if out of spec.

Parts needed: Wash temperature sensor (NTC thermistor), Wiring harness/connectors

Technician Only Inspect heater relay and control board connections

  1. Power off the machine and access control board area.
  2. Inspect the heater relay contacts and surrounding circuitry for signs of sticking or burn damage.
  3. Test continuity and replace the relay or board components as needed.

Parts needed: Heater relay, Control board

🛑 When to Call a Pro:
  • If the error persists after basic reset and inspection.
  • If you are not comfortable accessing internal electrical components.
  • If tests show inconsistent or out‑of‑range sensor readings.

Technical Specifications

wattage N/A
component Door Lock Mechanism
resistance 1-5 ohms
part_number C00195345
voltage_rating 230V AC

Common Questions

What does F03 error mean on Ariston washing machine?

F03 indicates a temperature sensor malfunction, preventing proper water heating during wash cycles.

Can I fix Ariston washing machine F03 error myself?

Yes, you can perform basic checks and resets. Unplug the machine, wait 10-15 minutes, then restart the cycle.

How much does it cost to fix F03 error?

Repair costs for the F03 error typically range from ¥3,000 to ¥10,000, including parts and labor.

When should I call a technician for F03?

Call a technician if the error persists after a reset, if you're uncomfortable with electrical components, or if sensor readings are inconsistent.

Sources & References

Data last verified: 2026-04-14

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