Ariston Refrigerator Error Code rt

The rt error code on an Ariston refrigerator indicates a fault with the room temperature probe, specifically an open circuit or short circuit condition. The room temperature probe is a thermistor-based sensor that monitors the ambient temperature of the environment surrounding the refrigerator. This data is used by the control board to adjust operational parameters, particularly at lower ambient temperatures. When the board detects that the probe signal is outside the expected resistance or voltage range, either due to a broken circuit (open) or a collapsed resistance path (short), it logs the rt code.

In an open circuit condition, the wiring between the probe and the control board has been broken, or the probe's internal thermistor element has failed, resulting in no signal reaching the board. A short circuit condition occurs when the probe's resistance collapses to near zero, which can result from moisture intrusion, physical damage to the sensor or its wiring harness, or a degraded connector. Both conditions produce an invalid temperature reading that the board cannot use for regulation.

Importantly, the refrigerator continues normal operation when this error is active. The control system inhibits room temperature probe monitoring and compensates internally, particularly relevant when ambient temperatures are below 13 degrees Celsius, where probe data would normally influence compressor and defrost cycle behavior. The error will clear automatically without a manual reset if the probe returns to correct function, meaning technicians should check for intermittent wiring faults or connectors before condemning the probe itself.