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Error code reference

Ariston Cooktop Error Code E.32

RER cooking zone temperature sensor in short circuit (CC).

Ariston codesAriston cooktop codes

RER cooking zone temperature sensor in short circuit (CC).

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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  • Verified part numbers when replacement is required
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What E.32 means on a Ariston cooktop

Error code E.32 on an Ariston cooktop indicates that the RER cooking zone temperature sensor has been detected in a short circuit (CC) condition. The RER sensor is a thermistor-based component positioned within or beneath a specific cooking zone to monitor surface or component temperatures during operation. When the control board reads an abnormally low resistance value from this sensor circuit, consistent with a direct short between the sensor leads or between a lead and ground, it triggers the E.32 fault and disables the affected zone as a protective measure.

A short circuit in a temperature sensor circuit typically means the two signal wires have made unintended contact with each other, or one wire has shorted to the chassis or another conductor. This differs from an open circuit fault, where resistance is too high. In a short circuit scenario, the resistance drops near zero, causing the control board to read an impossible temperature value and flag the condition. The fault can originate at the sensor itself, along the wiring harness routing from the sensor to the control board, or at the connector terminals.

Common physical causes include damaged wiring insulation from heat exposure near the cooking zone, pinched or crushed harness sections from improper panel reassembly, corroded or contaminated connector pins creating a low-resistance path, or a failed sensor whose internal element has shorted. Identifying the exact location of the short requires systematic resistance testing of the sensor and its wiring harness with the cooktop powered down and disconnected from mains supply.

Source: manufacturer service documentation.

Common causes of E.32

  1. 01

    Failed RER temperature sensor (internal short)

    Part replacement

    The thermistor element inside the sensor itself can fail and short internally, producing near-zero resistance regardless of temperature. Disconnect the sensor and measure its resistance directly to confirm this condition.

  2. 02

    Damaged wiring harness insulation

    Part replacement

    Heat exposure near the cooking zone can degrade the insulation on the sensor wiring, allowing bare conductors to contact each other or the metal chassis. Visually inspect the harness routing for melted, cracked, or abraded insulation.

  3. 03

    Pinched or crushed harness from panel reassembly

    Wiring / connection

    If the cooktop was recently serviced, the sensor wiring harness may have been pinched between panels or components, creating a short at that pinch point. Check along the full harness path for any areas of visible compression.

  4. 04

    Corroded or contaminated connector terminals

    Wiring / connection

    Moisture, grease, or cooking residue entering the sensor connector can create a low-resistance bridge between the signal terminals. Inspect the connector for discoloration, corrosion, or visible contamination and clean or replace as needed.

  5. 05

    Faulty control board sensor input circuit

    Part replacement

    In less common cases, the sensor input circuit on the main control board itself can develop a fault that mimics a short circuit reading even when the sensor and wiring are intact. This is diagnosed only after the sensor and harness have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E.32

What does E.32 mean on a Ariston cooktop?
E.32 indicates that the RER cooking zone temperature sensor has been detected in a short circuit condition. The control board is reading an abnormally low resistance from that sensor circuit, which signals a fault. The cooktop disables the affected zone to prevent unsafe operation until the fault is resolved.
Can I fix E.32 myself without calling a technician?
Some causes, such as a loose or contaminated connector, can be addressed by a knowledgeable DIYer who is comfortable working with disassembled appliances while the unit is unplugged. However, replacing the RER sensor or diagnosing a control board fault typically requires technical experience and proper test equipment like a multimeter. If you are not confident working with appliance wiring, a qualified technician is the safer choice.
Is it safe to keep using the cooktop while E.32 is active?
The cooktop should not be used while E.32 is active. The error indicates a sensor circuit fault that prevents proper temperature monitoring in the affected zone. Operating without functional temperature sensing creates a risk of overheating. Leave the unit unplugged until the fault has been diagnosed and repaired.
Will resetting the cooktop clear the E.32 error?
A power reset may temporarily clear the displayed code, but the fault will return as soon as the control board polls the sensor circuit again and detects the short. Because the underlying electrical fault remains present, resetting the cooktop does not resolve the problem and is not a substitute for proper diagnosis and repair.
How much does it cost to repair an E.32 error on an Ariston cooktop?
Repair costs vary depending on the root cause. Replacing the RER temperature sensor typically falls in the range of $80 to $200 including parts and labor. If the wiring harness requires repair or replacement, costs may be similar or higher. A control board replacement represents the most expensive scenario, often ranging from $200 to $400 or more depending on parts availability and labor rates in your area.

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