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Do Bosch Dishwashers Use Cold Or Hot Water?

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Last updated on September 26th, 2022 at 01:30 pm

Bosch dishwashers are great. Almost everyone who uses them has something good to say about them. Nonetheless, if you just purchased one and didn’t know how it works, you might be confused when using it.

And with the temperature of the water used is a significant factor in how clean the plates you wash will be, you may wonder whether Bosch dishwashers use hot or cold water.

Well, Bosch dishwashers work with either cold or hot water, meaning that even with the unavailability of hot water, you can rest assured that your dishwasher will operate normally and without any glitch whatsoever. Furthermore, bosch dishwashers will work without cold water even though cold water is more recommended. The cold water is used to wash, and the hot water aids thorough rinsing.

Do Bosch Dishwashers Use Hot Water?

Bosch dishwashers use hot water because, in the cleaning process, the hot water is used for the last rinsing reason being that the hot water helps reduce the percentage of germs to as low as 1 percent.

Bosch dishwashers need the complement of hot water for a more appreciated work. In preserving or saving energy while using hot water, it is recommended that you have an extra power source to supplement electricity. For better cleaning, Bosch dishwashers use hot water, originally cold water but heated by the dishwasher.

Notwithstanding the heater availability in the dishwasher, if you have a working hot water line at your disposal, you can go ahead and get it connected and run it through your dishwasher.

It’s a win-win. The hot water does not only clean your dishes but also serves as a sanitizer. It’s best to note that the bosch dishwasher will generate hot water on its own during the cycle of washing.

Do Bosch Dishwashers Use Cold Water?

Bosch dishwashers work with cold water. It is the primary source of hot water which means that the bosch dishwasher needs and uses cold water.

Dishwashers conserve energy better when using cold water. Bosch dishwashers use cold water and need cold water because they will work without hot water, and cold is needed for hot water.

Having the dishwasher connected to a cold water supply if you have a second resort energy generator is recommended.

Models like the Bosch SMS40M12AU dishwasher require only a connection to the cold water supply due to its automated and heating system.

Unlike the cold water, I discourage using below the advised water temperature from the hot water supply.

The bosch dishwashers operate with a minimum water pressure of 0.05 MPa (0.5 bar) and maximum water pressure of 1 MPa (10 bar). It’s best to note that this machine cannot function optimally outside these pressures.

Also, it is imperative to note that the bosch dishwashers have distinctive characteristics, making them stand out among other dishwashers from foreign companies.

And one of those features is that other dishwashers alien to Bosch use only hot water for the cleaning process. But the bosch dishwasher uses cold water and heats up to bring up hot water for cleaning.

Furthermore, if the model of your dishwasher is that of a crystal cycle, then a connection to a cold water supply will help you maximize this model. Other models will require only a connection to a cold water supply since it can generate hot water from inside.

How Hot Is The Water In A Bosch Dishwasher?

Bosch dishwasher temperatures range from 130 to 150 degrees Fahrenheit and reach even as high as 161 degrees.

Bosch dishwashers are designed to calculate the amount of water required through the sensors installed in the dishwasher. Therefore with every cycle, the water in the bosch dishwasher is exposed to a heat of 130 to 150 degrees.

Furthermore, it is worthy of note that you can maximize the bosch dishwasher to161 degrees Fahrenheit. However, this is no cause for alarm as it does not affect your plastic or rubber dishes.

When water is being pumped into the dishwasher, it moves slowly, passing through the heat chambers and a small heat coil which causes the water to heat up considerably fast.

It is quite impressive that the bosch dishwasher does not hesitate to heat the water up to 161 degrees by channelling the travelling water to the heating chambers, with the presence of coils that serve as the heater.

Now, there is a setting provided on the bosch dishwasher that allows you to increase the hotness of the appliance. There is also the sanitize setting which holds the place for the hottest setting on the bosch dishwasher.

This setting was specifically created to allow for heating water to temperatures as high as 151 degrees Fahrenheit, ensuring 99.9 percent cleanness.

Furthermore, the sanitized setting is recommended when dealing with children’s dishes. The dishwasher also comes with a flow rate of ten liters per minute.

Will Bosch Dishwashers Work Without Hot Water?

Bosch dishwashers use hot water, but it is not a necessity because it performs well even without hot water.

However, the manufacturer has recommended that you have a backup power generator like solar energy when cold water is in use to minimize energy usage.

The cycle time for the machine use ranges between two to three hours. While it may still function at this interval, it is best to let it cool to maintain its optimal performance.

A few issues attached to the bosch dishwasher might be of concern to you in the long run. People often battle with smelly dishwashers and cannot seem to be able to find their way around this.

Why do bosch dishwashers smell? Normally, bosch dishwashers do not emit any form of odor even when in use. However, several conditions may cause your dishwasher to smell.

These factors can range from you not cleaning it up after use and dirt accumulating on the inside over time which causes an odor. Or not clearing the drain pipes results in clogging and may cause an unpleasant odor to rise.

Another reason why your bosch dishwasher might smell is due to frequent washing with cold water. As stated above, warm water is preferred to be used in washing. Avoid washing with water below the cool water limit.

So, if you have a smelly dishwasher, here are some tips that will help you solve that problem:

  • Do away with every residue left in the dishwasher filter.
  • Thoroughly wipe the spray arms till it’s clean.
  • It would help if you cleaned the dishwasher tube properly.
  • Extend your cleaning to the drain line.
  • Frequent maintenance is highly recommended.


Bosh dishwashers typically use both cold and hot water. Nonetheless, it’s not compulsory for there to be water in the dishwasher.

Furthermore, over time, your dishwasher might begin to develop an odor. In this case, it’s best to take the steps aforementioned here to resolve this issue.

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