If your dishwasher starts on its own and runs for a few minutes without any input or command, there could be several potential causes for this behavior. Here are a few possibilities:
Power surge: A sudden power surge or electrical disturbance could cause the dishwasher's control panel to malfunction temporarily, leading to an unintended start. Check if there were any recent power fluctuations or electrical issues in your home.
Faulty control panel or keypad: The control panel or keypad on the dishwasher might be experiencing a malfunction. A stuck button or a faulty circuit could trigger the dishwasher to start spontaneously. Inspect the control panel for any signs of damage or wear and consider contacting a professional for repairs or replacements.
Sensor issues: Dishwashers often have sensors that detect water levels, temperature, or other variables. If any of these sensors are malfunctioning, it could result in the dishwasher starting unexpectedly. The faulty readings might mislead the appliance into thinking that a wash cycle needs to begin.
Timer or programming error: Double-check the dishwasher's timer and programming settings to ensure there are no errors. It's possible that a previous user accidentally set a delayed start or an auto-start feature without realizing it.
Interference from other appliances: In rare cases, electromagnetic interference from other nearby appliances or devices might cause your dishwasher's control system to act up. Try moving other electronics away from the dishwasher and observe if the issue persists.
Malfunctioning circuit board: The dishwasher's circuit board or electronic control board could be malfunctioning, resulting in sporadic and unintended operations. This would likely require professional diagnosis and repair.
If the issue continues or you are unable to identify the cause, it is advisable to contact a professional appliance repair technician. They can assess the situation accurately and provide appropriate solutions to resolve the problem with your dishwasher.