How does a dishwasher work?

We all know the magic of the dishwasher: dirty dishes are loaded and, once the set program is finished, our dishes are returned to us neat and shiny.

But, in practice, how does the dishwasher work? Knowing what exactly happens during the washing process may not be as obvious. A dishwasher is a machine that performs a complex series of operations in order to guarantee impeccable cleaning, but the basic mechanisms respond to elementary logic. Most dishwashers follow the same procedure, which can be divided into seven distinct phases:

1) Water storage

Before being placed in the dishwasher, the water is taken from the water supply and fills a special tank, generally positioned on the bottom of the appliance.

2) Water heating

The water present in the aforementioned tank is brought to a higher temperature by means of electric resistance.

3) Adding the detergent

The detergent flap opens and the product mixes with the water, thus forming a sanitizing solution. This occurs automatically during the correct washing stage, according to the timer or the preset program.

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4) Washing the dishes

The detergent solution is transported inside the spray arms which, thanks to the pumping pressure, rotate and radiate the water with sufficient force to reach all the dishes.

5) Discharge of the dirty water through a special pump

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6) Rinsing of disheshow does a dishwasher work

The water, stored and heated, undergoes the same procedure as for washing but, this time, it is sprayed without adding detergent. This operation removes any residual dirt and any traces of detergent still present on the dishes.

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7) Drain the second water cycle

All we have to do, in exchange for the hard work done by this prodigious appliance (in addition to the obvious things, such as loading the baskets), is to proceed to a thorough cleaning of its parts, at least once a month. The reasons behind such regular maintenance become clear as soon as you understand how the dishwasher works and what its main components are.

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Heating element

The resistance is a metal device, capable of converting electrical energy into thermal energy to heat the water up to the desired temperature. Given the direct and constant contact with water, these components are particularly subject to the accumulation of limescale.


A pump is an operating machine that can perform two functions: to feed the internal jets for cleaning the dishes or to facilitate the passage of water during the drainage procedure. If you are wondering how it works in the dishwasher, know that this device is regulated by a program that opens and closes the valves at the right moment, so that the water is always pushed in the right direction.


arms The spray arms are hollow, so as to allow the internal circulation of water. The pumping force generates their rotation, ensuring a widespread of each jet. Food, grease, and other types of dirt can clog the nozzles, so it is essential to clean the dispensers frequently.

Now that you know how the dishwasher works, all you have to do is carry out its maintenance. Monthly use of Finish Cura Dishwasher helps you to eliminate traces of limescale, as well as fat and food deposits that can clog the vital parts of this appliance and compromise its proper functioning.

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