Ariston Refrigerator Error Code dR

The dR error code on an Ariston refrigerator indicates a door switch fault, specifically triggered when the refrigerator door remains open or is detected as open continuously for a period of one hour following the initial door opening event. The control board monitors the door switch signal in real time, and when it fails to detect a proper door-closed signal within that one-hour window, it registers the fault and activates the dR alert. This is a protective function designed to prevent excessive cold air loss, compressor overwork, and internal temperature rise.

The door switch itself is a simple electromechanical component, typically a plunger-style or magnetic reed switch, that sends a signal to the main control board indicating whether the door is open or closed. A fault can occur either because the door is genuinely left open, or because the switch has failed mechanically or electrically and is stuck reporting an open state even when the door is physically closed. Wiring between the switch and the control board can also contribute to a false fault reading if a connection becomes loose or corroded.

Importantly, the error resolves automatically without requiring a manual reset. Once the control board detects a proper open-and-close cycle from the door switch, confirming the switch is functioning and the door is closed, the dR code clears on its own. During the fault period, certain functions connected to door switch detection may be inhibited. If the code persists after confirming the door is closed, the switch or its wiring should be inspected as the next diagnostic step.