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Error code reference

Ariston Oven Error Code ER06

Oven PTC temperature sensor is short circuited.

Ariston codesAriston oven codes

Oven PTC temperature sensor is short circuited.

First step from the service manual

Verify functioning of PTC (ambient temp should read 545 ohm), then replace if necessary.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What ER06 means on a Ariston oven

The ER06 error code on an Ariston oven indicates that the PTC (Positive Temperature Coefficient) temperature sensor in the oven cavity has developed a short circuit condition. A PTC sensor is a type of resistive temperature detector whose electrical resistance increases predictably with rising temperature. At ambient room temperature, a correctly functioning Ariston oven PTC sensor should measure approximately 545 ohms. When the sensor shorts internally, its resistance drops abnormally low or reads near zero, causing the oven's control board to detect an out-of-range signal and trigger the ER06 fault.

The PTC sensor is responsible for feeding accurate temperature data back to the oven's control electronics, which use this information to regulate the heating elements and maintain the set cooking temperature. A short circuit in this sensor means the control board receives a false signal that does not correspond to actual oven conditions. This can prevent the oven from heating, cause erratic temperature behavior, or result in the oven shutting down as a safety measure to prevent overheating or damage to internal components.

Common causes of a shorted PTC sensor include physical damage to the sensor body or its connecting wiring, moisture ingress into the sensor or harness connectors, and heat degradation of the sensor's internal components over time. Before replacing the sensor, the wiring harness and connectors between the sensor and the control board should also be inspected for pinched wires, burned insulation, or corroded terminals, as these can produce a short circuit independent of the sensor itself.

Source: manufacturer service documentation.

Common causes of ER06

  1. 01

    Failed PTC temperature sensor

    Part replacement

    The PTC sensor itself has shorted internally, causing its resistance to fall well below the correct ambient reading of approximately 545 ohms. This is the most common cause and is confirmed by measuring resistance directly across the sensor terminals.

  2. 02

    Damaged sensor wiring harness

    Part replacement

    The wiring between the PTC sensor and the control board may have pinched, burned, or melted insulation creating a short between conductors. Visually inspect the full length of the harness for signs of heat damage or contact with sharp metal edges.

  3. 03

    Corroded or shorted connector terminals

    Wiring / connection

    Moisture or grease contamination inside the wiring harness connectors can create a conductive path between terminals, mimicking a shorted sensor. Inspect connectors at both the sensor and control board ends for corrosion, debris, or moisture.

  4. 04

    Moisture ingress into the sensor

    Wiring / connection

    Liquid that has entered the oven cavity during cleaning or a spillover event may have penetrated the sensor housing and caused an internal short. Allow the oven to dry fully and retest resistance before replacing components.

  5. 05

    Faulty control board

    Part replacement

    In rare cases, a fault on the control board itself can incorrectly report a sensor short even when the PTC sensor and wiring both test correctly. This should only be considered after the sensor and harness have been confirmed good.

See the test procedure for each cause

Frequently asked questions about ER06

What does ER06 mean on a Ariston oven?
ER06 on an Ariston oven means the PTC temperature sensor in the oven cavity has been detected as short circuited. The PTC sensor monitors oven temperature and at room temperature should read approximately 545 ohms resistance. A short circuit causes the resistance to drop to an abnormal level, which the control board interprets as a fault and halts normal operation.
Can I fix ER06 on my Ariston oven myself?
A knowledgeable DIYer comfortable with basic electrical testing can diagnose ER06 by using a multimeter to measure the resistance of the PTC sensor at its terminals, comparing the reading to the expected 545 ohms at ambient temperature. If the sensor reads significantly lower or near zero, it needs to be replaced. The wiring harness and connectors should also be inspected for damage. If you are not comfortable working with oven wiring, a qualified appliance technician should perform the repair.
Is it safe to use my Ariston oven when ER06 is displayed?
It is not recommended to continue using the oven while ER06 is active. A shorted temperature sensor means the oven's control system cannot accurately monitor the internal temperature, which could lead to overheating, inconsistent cooking results, or further damage to control components. The oven should be kept switched off until the fault is diagnosed and repaired.
How much does it cost to repair an Ariston oven ER06 error?
If only the PTC sensor requires replacement, parts costs are typically in the range of $20 to $60 depending on the specific model, with labor adding $80 to $150 if a technician performs the work. If the wiring harness or control board is also found to be faulty, total repair costs can rise to $150 to $350 or more. Getting a diagnostic quote before committing to repairs is advisable.
Will resetting my Ariston oven clear the ER06 error?
A power reset by switching the oven off at the circuit breaker for a few minutes may temporarily clear the ER06 display, but the error will return as soon as the control board reads the shorted sensor again. Because ER06 indicates a hardware fault in the PTC sensor or its wiring, the underlying problem must be physically repaired or the component replaced before the error will be permanently resolved.

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