Dryer stops shortly after starting, may not heat correctly, F03 displayed

Safety first: Disconnect power before removing the front or rear panels. Heating components can remain hot after use.

• Access the NTC: On many Ariston dryers, the NTC temperature sensor is mounted on the heater housing or air duct. Remove the rear panel or lower front kick panel to locate it.
• Inspect wiring: Check the two‑wire connector to the NTC for corrosion, loose fit, or broken wires. Clean contacts gently and reseat the plug.
• Check for lint buildup: Excess lint on the heater duct and sensor can cause incorrect readings. Carefully vacuum lint from around the sensor and duct without damaging the sensor body.
• Sensor replacement: If F03 persists, the NTC is likely out of range. It is usually held by one or two screws or a clip. Remove and replace with an Ariston‑compatible NTC sensor, reconnect wiring, and reassemble panels.
• When to call a technician: If a new NTC does not clear the error, the fault may be on the control board’s sensor circuit and requires professional diagnosis.