Ariston Cooktop Error Code E.54

E.54 means the temperature sensor in the front-left (FRL) cooking zone has been detected in a short circuit condition. The control board cannot read a valid temperature from that sensor and has disabled the zone as a safety precaution. The fault points to either the sensor itself, its wiring harness, or the connector between them. Diagnosis requires physically inspecting the sensor circuit for damage or moisture.

The affected front-left cooking zone should be considered non-operational while this fault is active, as the cooktop has disabled it due to loss of temperature control. Using other zones on the cooktop may be possible depending on how the control board handles the fault, but continued use without resolving the underlying short circuit is not recommended. Address the fault before relying on the appliance for regular cooking.

A power reset, such as switching off the circuit breaker for 30 to 60 seconds, may temporarily clear the error code display. However, if the underlying short circuit condition in the FRL sensor circuit still exists, the code will return as soon as the cooktop attempts to use or monitor that zone. A reset alone does not fix the fault and should only be used as a diagnostic step, not a solution.

Some homeowners comfortable with basic appliance repair can inspect the wiring harness and connector for obvious damage or moisture and attempt to clean or dry the connector. However, replacing the temperature sensor or tracing a damaged harness requires disassembling the cooktop and working near electrical components. If you are not experienced with appliance electrical systems, it is safer to have a qualified technician perform the repair.

Repair costs vary depending on the root cause. If only the sensor connector needs cleaning or drying, the cost may be limited to a service call fee, typically in the range of $80 to $150. Replacing the FRL zone temperature sensor generally adds $30 to $100 in parts. If the control board requires replacement, total costs can range from $200 to $450 or more depending on parts availability and labor rates in your area.