Dishwasher not heating water

Dishwasher not heating water

If suddenly after the end of the wash cycle you find that your dishes are cold, wet and dirty, this is a sure sign that the water in the dishwasher does not heat up, or does not heat up enough.

You should not panic, it is likely that the reason for this is banal everyday circumstances, which can be quickly corrected either with your own hands or with the involvement of a specialist.

  • If you have a new dishwasher and you are using it for the first time , there is a high chance that it is simply not connected correctly. Because of this, the “dishwasher” can continuously draw and drain water and, as a result, does not have time to heat it. Unfortunately, only a person familiar with the rules for installing dishwashers can fix this problem.
  • Wrong washing mode selected . Make sure you set the correct mode: some involve heating the water only up to 30-40 degrees (the so-called “delicate wash”). Also, in machines with electromechanical control, it happens that if you select a mode with a maximum heating of 30 degrees, and fix the manual toggle switch at 90 degrees, the dishwasher will work by default according to the selected program, that is, the maximum water heating will be the same 30 degrees . You can read more about this in the instructions for your unit.
  • The filter is clogged . If the filter in modern “dishwashers” becomes clogged, then the water circulation decreases, because of this, the heating element does not turn on, and the machine, accordingly, does not heat the water. The filter must be cleaned, and henceforth do it regularly – after each washing cycle.

We hope that among the reasons described above, you have found the key to unraveling your problem. If this does not happen, we are talking about a more serious malfunction that requires a competent approach. In order not to languish in doubts about why your dishwasher does not heat water while waiting for a repair specialist, check out the table that lists the most common breakdowns.

Typical breakdowns in which the dishwasher does not heat water

Considering the quality of water in the metropolis and periodic power surges, it’s easy to imagine why the heating element and other devices fail every now and then in dishwashers. If among the signs described below you find those that correspond to your situation, do not worry. All these problems are regular, and can be eliminated by a specialist quickly enough.


“Burned” the heating element of the dishwasher (heater)

Dishwashers are equipped with a heating element (heater) or instantaneous water heater. Outwardly, these devices are similar to those used in washing machines, and the principle of their operation is similar to the heating system of electric kettles. Given the hardness of the capital’s water, the heating element is very susceptible to scale and refers to consumables that must be replaced over time. A “burnt” heating element cannot be repaired, it is necessary to install a new one.

The temperature sensor (thermostat) is out of order

The thermostat, which all dishwashers are equipped with, is a special sensor that measures the temperature of the water and sends the data to the software module. If this does not happen, the module does not give a command to the heating element to heat the water. The thermostat needs to be replaced.
The control module has failed Dishwashers are equipped with a control module that performs the functions of a “brain” – it analyzes data from other units of the unit and issues commands. If it malfunctions, the command to heat the water may not be given to the heating element. A “flashing” of the control module or its replacement is required.

Elimination of all the listed faults requires special knowledge and a qualified approach. Moreover, some breakdowns have similar features, but are repaired by completely different methods. That is why we do not recommend that you do it yourself: it can not only increase the cost of repairs, but also lead to the fact that the dishwasher will go to the landfill forever.


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