If your dishwasher makes noise when it turns on but doesn't start the cleaning cycle immediately, it's likely due to the initial steps of the dishwasher's operation. When you start a dishwasher, it goes through several pre-cleaning processes before the main wash cycle begins. Here are some common reasons for the noise during this stage:
Water fill: When you start the dishwasher, the first step is typically to fill the dishwasher's tub with water. This can be noisy as water is drawn from the supply line and enters the dishwasher's tub.
Pre-wash or rinse cycle: Some dishwashers have a pre-wash or rinse cycle that runs before the main wash. During this stage, the dishwasher may spray water around the interior to moisten and remove any initial food particles or residues.
Motor and pump noises: The dishwasher's motor and pump are responsible for circulating water throughout the unit. These components may run briefly at the beginning to ensure proper water distribution and to check for any blockages or issues.
Detergent dispenser release: If your dishwasher has a built-in detergent dispenser, you might hear a click or noise when it releases the detergent into the dishwasher's tub.
Sensor checks: Modern dishwashers often have sensors that detect factors like water level, water temperature, and soil levels. The dishwasher might run some quick checks during the startup phase to ensure everything is functioning correctly.
All these noises are part of the dishwasher's normal operation and should not be a cause for concern. However, if you notice any unusual or excessively loud noises, or if the dishwasher doesn't progress to the main wash cycle after a reasonable amount of time, there might be an issue that requires inspection and possible repair by a professional technician.
As a general tip, reading the dishwasher's user manual can provide valuable insights into its specific startup sequence and normal operating sounds.