Dishwasher Not Cleaning Dishes Well

Dishwasher Not Cleaning Dishes Well

You open the dishwasher door, and instead of clean and shiny dishes, there are still dirty dishes with food debris and soap stains. Familiar? The spectacle, of course, is unpleasant and sad. But do not rush to look for signs of a malfunction in your “assistant” – it is likely that the problem is caused by banal reasons that you can fix yourself!

Problems associated with improper use of dishwashers:

  • Leftover food and dried food. If you do not remove all this from the dishes, then the quality of the sink will never be perfect. All manufacturers warn about this rule, and it is recommended to follow it.
  • Wrong mode selection. Economy and short programs are only for light soiling, while greasy dishes require the longest cycle at the highest temperature.
  • Machine overload. If your dishwasher doesn’t wash dishes well, you may be loading too many plates and other utensils into it. Try to put less dishes next time – most likely, your problem will be solved.
  • Improper use of detergents. The wrong choice of cleaning chemicals and / or its quantity is a common cause of poor dishwasher performance. Try reducing or increasing the amount of rinse aid, or even change the brand.

If all these manipulations did not lead to a positive result, and your dishwasher is still not washing dishes well, then you will have to get to know it better. Or rather, with its internal structure. Some problems appear as a result of regular use of the dishwasher and may well be resolved without the involvement of specialists.

Problems associated with the active operation of dishwashers:

  • Scale. Perhaps this is one of the most insidious enemies of dishwashers. Scale appears due to hard water (even despite the use of special softeners), it is not visible on the plastic parts of the equipment, but inside, where the parts are metal, the scale is slowly doing its job. Settling on the sprinklers, the scale prevents the spraying of water, and, as a result, the dishwasher does not wash the dishes well. To eliminate this problem, it is necessary to pour citric acid into the machine instead of detergent and drive it off at maximum temperature in idle mode.
  • blockages. The cause of blockages are food debris, particles of napkins and other debris that gets inside the machine on the dishes. As a rule, coarse and fine filters, as well as sprinklers, are most affected by this “disease”. Therefore, if suddenly your dishwasher began to wash dishes poorly after many months of proper operation, the first thing to do is to check the filters. And continue to clean them after each use of the dishwasher, as manufacturers recommend.

So, the filters are cleaned, the amount of detergent is adjusted in milliliters, the correct mode is selected, and you have scrubbed the dried dirt from the plates – but the dishwasher does not wash the dishes, as before! It looks like you’ve run into a really serious problem. Well, look for its signs in the table below.

6 breakdowns due to which the dishwasher does not wash dishes efficiently

Causes, signs and remedies

The water heater (heater) is out of order

Dishwashers are equipped with a water heating device (TEH). This element is more prone to scale formation than all others, and “burns out” during prolonged use. When the heating element fails, the water does not heat up, respectively, the dishwasher does not wash dishes well, since most of the dirt cannot be washed with cold water. TENA needs to be replaced.

Malfunction in the circulation pump

The water pump pumps water into the dishwasher. If it fails, then water does not flow to the dishes, respectively, the washing process does not start. The circulation pump needs to be replaced.
Sprinkler impeller broken The impeller is a special mechanism that rotates the rocker with sprinklers. If the impeller fails, then the sprinklers do not rotate (there may be an interruption in the operation of one or both sprinklers) and the water does not wash the dishes well. The impeller needs to be replaced.
Thermal sensor (thermal switch) malfunction Thermal sensor – measures the temperature of the water and sends this information to the software module, which gives the command to the heating element to heat. If information from the temperature sensor is not received, the water does not heat up, and the dishwasher does not clean the dishes well with cold water. The thermostat needs to be replaced.
Malfunction or malfunction of the software module The software module sends commands to all technical components of the dishwasher, for example, “heat water”, “drain water”, “draw water”. If the software module fails, the dishwasher starts to work incorrectly or stops working completely. Requires “flashing” the module or its replacement.
Malfunction in the water turbidity sensor (only in expensive models of dishwashers) Expensive models of dishwashers are equipped with a water turbidity control sensor. Thanks to him, the software module receives information about the state of the water – if it is cloudy, then the dishes are still dirty, and the washing cycle should be continued. When the sensor fails, the software module “does not understand” the current soiling of the dishes, and the dishwasher cannot complete the washing cycle correctly. The turbidity sensor needs to be replaced.

All these breakdowns can only be repaired by a qualified craftsman who has the specialized knowledge, experience and specialized equipment necessary for diagnosis and repair. Attempts to fix the dishwasher on your own can lead to disastrous results – and it’s good if the specialist then manages to eliminate the consequences of such amateur performance. In our practice, there were cases when we had to change a “burnt out” control module due to the fact that before that the client tried to install the temperature sensor himself, and did it wrong. As a result, the total amount of repairs turned out to be much higher – after all, the control module is the “brain” of the dishwasher.

Questions – answers

Good afternoon, after repair (there was an error 12), the machine stopped rinsing. The built-in BOSH machine was removed from the facade. Is it possible that they forgot to connect something. after washing with a white coating.

Master’s answer:
Mary, it is necessary to check on the spot. Very difficult to tell from a distance.

Hello. After washing, there is still a coating (some white small grains), some of the dishes remain dirty and the rinse aid ends every two washes (I used to fill it every 2 months). So far it has been very good soap. Electrolux machine, tell me, please, what could be. Thanks!

Master’s answer:
Good afternoon! There may be a problem in the rinse aid nozzles and they are leaking into the machine.

Yes, I use salt and powder. I fall asleep with salt, the indicator asks to fall asleep no more often than usual. But where does all the rinse aid go? This was not the case before. Maybe something broke inside and it pours out all over?

Master’s answer:
Linda, most likely, the drain pump does not work at the right time.

Hello! Pmm miles, for 9 years now, the rinse aid sensor has been constantly on. I fill it in, wash it 1 time and again it burns, and there it is already empty inside in the rinse aid compartment. Even if you pour a lot. Where does he go? In principle, it washes normally, the dishes are clean, only there are white spots on Teflon pans, but they have happened before. What could it be?

Master’s answer:
David, your water is too hard or soft. Do you use dishwasher salt?

Hello. On your recommendation, we tried adding salt – it did not help. We thought the pressure was low, we tried to put the BOCSH car into 9 sets, the flow rate was 9 liters – it didn’t turn out well. We put our BOCSH car back on a minimum set of 12 sets (water consumption 14-16 liters) – it still got bad. Please tell me, can it be washed badly due to the volume of the machine (does the number of sets matter)? Thanks in advance.

Master’s answer:
The number of sets of dishes does not matter. It is necessary to check the circulation pump and the drain filter.

Hello. Please tell me, the BOSH dishwasher does not wash dishes. Rocker arms are clean, Ten works, water flows. The car has been used several times. What to do, tell me please. Thank in advance.

Master’s answer:
Good afternoon! Doesn’t clean just the top or both levels? If on both, then the matter may be in the circulation pump or the lack of salt. If only on the top, then check the rocker gaskets.

salt tank without water, water does not circulate, I hear how the circulation pump turns on

Master’s answer:
Barbara, either the leakage protection system worked, or the water supply solenoid valve failed.

Thank you for your answers. Plaque on everything – looks like black paper. They clogged both inside the sprinklers and blackness on the grates. We wash for hours. It peels off like a thick film. What do you advise? Prior to this, experience with other water with another machine without problems for 5 years.

Master’s answer:
Joseph, remove the drain filter of the machine and see if there is any plaque there. if there is, then send a photo of the raid to the mail from the contacts of our site.

I did not use citric acid, I think it started after adding salt. What protective layer do you mean? We have very hard water, how often and how much salt should be added? Electrolux car, six months.

Master’s answer:
Joseph, is there a plaque on the metal parts of the machine? If yes, then it may be due to the washing off of the oxide on the metals.

Hello! A black sticky coating accumulates in the car, a thick film on all parts. Feeling like mold or chemical reaction. We wash every day with difficulty the whole car and it appears again. Dishes are not washed. What could it be?

Master’s answer:
Karen, you did not use lemon juice to wash the dishwasher. Maybe a protective layer of meaning.

The dishwasher fills with water, starts washing dishes for 30 seconds and then turns on the key. What does this mean?

Master’s answer:
Nancy, if the water is cold, then the reason may be in the heating element (water heater).

Hello. Machine BOSCH SRV 55T03EU/38. After turning on the power, when you select any program, the indicator shows the planned operating time is significantly less than usual. For example, in the “70 degrees” program, only 30 minutes, in the “Auto 55-65 degrees” mode – 29 minutes. Then, after starting the program, the machine is buzzing, but the washing is not performed. When you open the door, you can see that the program time is reduced.

Master’s answer:
Daniel, either a water heater (heater) or a circulation pump.

Good afternoon! Pmm hansa. There was a need to replace the nut of the upper impeller (the seal came into negligence). ZCH purchased. I can’t unscrew the old nut in any way (it seems that it is screwed tightly). There was an idea to try with a gas key through some soft cloth. Can anyone suggest a more humane way and a special tool?

Master’s answer:
Charles, good afternoon! Indeed, apart from a wrench or an adjustable wrench, we can offer nothing.

The hardness of the water in the dishwasher is set correctly. Water hardness measured itself with pom. tests.
Use finish powder and finish rinse, salted dishes after washing. Wash cycle 2.5 hours. Could there be a problem with a broken ion exchanger? Dishwasher is new, bought a couple of weeks ago.

Master’s answer:
Any, the ion exchanger has nothing to do with it. Could only crack the salt container. Call the wizard from the warranty service.

Good afternoon. I recently bought a wfc 3c26 dishwasher. Added salt as directed. Water hardness adjusted. I use powder from Finish, I do not use rinse aid. After the dishes have been washed and dried, a lot of white and salty drops remain. All the dishes are salty (I have already tried all the water hardness modes, the situation does not change. With additional rinsing, the dishes remain salty. The lid from the place where I sprinkle the salt is closed tightly

Master’s answer:
Any, this is not completely washed off with salt or detergent. Maybe you already have normal water and salt consumption is too big.

Hello. immediately after installing the Ariston pmm, the car body began to rattle. mostly when the car starts rinsing. I press the body with my hand, it stops making noise, I release it, it rattles again. What to do?

Master’s answer:
Betty, you need to properly level your dishwasher.


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