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Error code reference

Ariston Cooktop Error Code E.24

Dissipator temperature sensor Supplying Generator in short circuit (CC).

Ariston codesAriston cooktop codes

Dissipator temperature sensor Supplying Generator in short circuit (CC).

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What E.24 means on a Ariston cooktop

The E.24 error code on an Ariston cooktop indicates that the dissipator temperature sensor associated with the supplying generator has been detected in a short circuit (CC) condition. The dissipator temperature sensor is a thermistor-based component mounted on or near the heat sink of the induction power supply generator. Its primary function is to monitor the thermal state of the power electronics, preventing the generator from overheating during operation. When the control board reads a resistance value from this sensor that falls below the expected minimum threshold, consistent with a short circuit rather than a valid temperature reading, it triggers the E.24 fault and shuts down the affected cooking zone.

A short circuit condition in the sensor circuit can originate at the sensor itself, in the wiring harness connecting the sensor to the control board, or at the connector terminals. A shorted thermistor will present near-zero resistance, which the control board interprets as an implausibly high temperature, causing an immediate protective shutdown. Damaged wiring insulation, pinched harness routing, or corroded connector pins can also create an unintended low-resistance path that mimics a sensor short.

Diagnosing this fault requires isolating the sensor circuit with a multimeter. Measuring resistance across the sensor terminals while disconnected from the board will confirm whether the sensor itself is shorted or whether the fault lies in the wiring. The supplying generator and its associated control board should also be inspected for signs of overheating, burn marks, or component damage that could have caused or resulted from the thermal event.

Source: manufacturer service documentation.

Common causes of E.24

  1. 01

    Failed dissipator temperature sensor

    Part replacement

    The thermistor sensor itself has internally short-circuited, presenting near-zero resistance to the control board. This can be confirmed by disconnecting the sensor and measuring its resistance with a multimeter; a shorted sensor will read close to 0 ohms instead of the expected resistance value for the ambient temperature.

  2. 02

    Damaged or pinched wiring harness

    Part replacement

    The wiring between the dissipator sensor and the control board may have damaged insulation, causing two conductors to contact each other and create a short circuit. Inspect the full length of the harness for pinch points, heat damage, or abrasion against internal chassis components.

  3. 03

    Corroded or shorted connector terminals

    Wiring / connection

    Moisture or heat exposure can cause corrosion or bridging between the connector pins at the sensor plug or the board-side connector, creating a low-resistance path that triggers the short circuit fault. Visually inspect the connectors for discoloration, corrosion, or debris.

  4. 04

    Faulty control board

    Part replacement

    If the sensor and wiring harness both test within normal parameters, the control board's sensor input circuit may have failed, causing it to incorrectly report a short circuit condition. Board-level damage from overheating or voltage spikes can affect sensor input channels.

  5. 05

    Overheated or damaged supplying generator

    Part replacement

    A prior overheating event in the induction power supply generator can damage nearby components including the sensor and its mounting. Inspect the generator heat sink and surrounding area for burn marks, melted insulation, or deformed plastic components.

See the test procedure for each cause

Frequently asked questions about E.24

What does E.24 mean on a Ariston cooktop?
The E.24 code means the dissipator temperature sensor for the supplying generator has been detected in a short circuit condition. The dissipator sensor monitors the heat sink of the induction power electronics, and when the control board reads a resistance value consistent with a short circuit, it shuts the cooktop down to prevent damage. The fault points to either the sensor itself, the wiring harness, the connectors, or the control board.
Can I fix the E.24 error myself?
Some basic checks, such as inspecting the wiring harness for visible damage or cleaning corroded connector pins, can be done by a confident DIYer after unplugging the cooktop. However, replacing the dissipator temperature sensor or the control board requires disassembling the cooktop and working with internal electronics, which is typically best left to a qualified technician. Always disconnect power completely before inspecting any internal components.
Is it safe to use my Ariston cooktop while E.24 is displayed?
No, you should not attempt to use the cooktop while E.24 is active. The error indicates the thermal protection sensor for the power supply generator is not functioning correctly, meaning the cooktop cannot reliably protect itself from overheating. Continuing to operate it could risk damage to the internal electronics or create a safety hazard.
Will resetting the cooktop clear the E.24 error?
A power reset by switching off the cooktop at the circuit breaker and restoring power may temporarily clear the fault display, but if the underlying short circuit condition in the sensor or wiring remains, the E.24 error will return as soon as the cooktop attempts to operate. A reset does not repair the faulty component and is not a substitute for proper diagnosis.
How much does it cost to repair an E.24 error on an Ariston cooktop?
Repair costs vary depending on which component has failed. Sensor replacement tends to be a lower-cost repair, generally in the range of $80 to $200 including parts and labor. If the control board requires replacement, costs can rise to the $200 to $500 range or higher. Getting a diagnostic assessment from a qualified technician is the best way to estimate the repair cost for your specific situation.

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