Repair of PMM: causes of breakdown of a household appliance, ways to troubleshoot dishwasher malfunctions

Almost every housewife has a dishwasher; it makes life much easier, eliminating the exhausting daily washing of dishes. Therefore, failure or other malfunctions of such a kitchen unit force the consumer to urgently seek help from service centers. Although often the repair of the PMM can be done independently at home. But first, it's worth figuring out which breakdowns are most common.

Design features

Domestic dishwashing equipment has a device similar to a washing machine. The only difference is that the former does not have a rotating drum. And also there are several additional functions that provide the process of washing dishes.

You can figure out what exactly is in the car after opening the front wall of the device. As a rule, the main nodes consist of the following parts:

• control Panel;
• processor including the board;
• motor;
• turbofan;
• Heating element;
• sprayers;
• capacitor;
• delivery pump;
• valve for water supply.

All elements are built into a sealed metal case, which is covered with a special stainless composition. In addition, it is absolutely insensitive to temperature fluctuations, as well as to the aggressive effects of detergents. Modern models are equipped with soundproofing and thermal insulation.

The control panel, which is located in the front of the device, has a microcontroller (special timer), control buttons and an indicator display.

The spray units are equipped with a piping system and spray nozzles. It is through them that water and detergent flow under strong pressure. Due to this, high-quality cleaning and washing of dishes is achieved.

To prevent the dishwasher from leaking, it is equipped with a special float switch. As for the drain unit, it is similar to the drain of a washing machine. Also included in the design is a water pump, it is installed next to the engine. An important element is the filtration system, which catches product residues and other debris.

The main causes of breakdowns

An easier way to identify what exactly broke in the device is by the error code that is displayed on the electronic display. If the machine carried out a self-diagnosis and determined this code, then, having decoded it, you can find a specific breakdown.

If, after turning on, the household unit starts to blink erratically, then this may be a system failure. A simple reboot usually helps to fix the situation. To do this, disconnect the device from the mains, wait about 20 minutes and plug the cable back into the socket. If there is no blinking, then there is no reason to worry. If the problem persists, then, most likely, there were some failures in the control module.

Besides, dishwasher repair may be necessary in the following cases:

1. Various blockages are the most common problem. The fact is that poor-quality cleaning of product residues leads to the fact that the filter, pipe and pump become clogged, Such a nuisance is quite easy to eliminate on your own.
2. Water leaks in the area of ​​the bunker door. Often this situation happens due to the poor quality of the seal. Since this element needs to be changed once a year. You can also make a replacement yourself.
3. The machine does not work or freezes constantly. Here you need to check the electronic module. It is quite simple to determine the cause, since the unit begins to wash the dishes for a longer period. In addition, the device can work without stopping at all. In this case, it is better to entrust the repair of the dishwasher to a specialist, since it is rather difficult to repair the appliance without experience.
4. If at the end of the work the PMM does not drain the water, then it is worth checking the drain path. Inspection must begin with the filter, drain and pump. In the opposite situation, when fluid is not being set, it is necessary to check the intake system: the hose and the inlet valve.
5. If the electric motor does not turn on and the process does not start, then you should pay attention to the door, it may simply be loosely closed. The fact is that the device has a protection that does not allow starting a cycle when the bunker door is open. In addition, it is worth inspecting the wiring, fuse located on the dashboard and control board.

Often, dishwasher equipment turns off or knocks out the counters due to short circuits on the heating element. Here is a list of the main causes that can lead to malfunctions in a household appliance. Now it's worth figuring out how you can eliminate them at home.

Renovation work

It is not difficult to make an independent repair if you follow the step-by-step instructions. It is worth considering and fixing simple faults first.

Clearing blockages

If water stagnates in the dishwasher and in the rest of the sewer system, then it is necessary to thoroughly clean the siphon. If the sewage system is connected directly, then the blockages must be broken through with the help of special devices and means.

Next, you need to disassemble the household equipment, but first drain all the water by pressing the "Drain" button. Further verification is carried out as follows:

1. First, the hoses are inspected, moreover, both drain and filler. The fact is that they can simply be pinched or twisted.
2. If there are problems with the fluid supply, then you need to check the shut-off valve, maybe it is closed.
3. Then the filling hose is disconnected from the machine and cleaned. It is best to carry out flushing activities under running water.
4. After that, you should start cleaning the inlet filter and filler valve.
5. There is a drain filter at the bottom of the case; it must be pulled out and all debris removed from it. Residual water in the hole is removed with a regular sponge.

To check the impeller, you need to remove the cover, for this you need to press a little on it, and then pull it slightly upward. After that, the part is carefully inspected and, if necessary, cleaned. It is better to use rubber gloves while working. With such simple manipulations, you can independently remove the blockages in the dishwasher.

Door faults

If the door breaks in the unit or the seal is worn out, then the defective parts must be replaced. To do this, you need to follow a series of steps. First you need to open the door and remove the old seal strictly along the perimeter. Then take a new gasket and install it in the same way as the old element.

If the door does not close in the appliance after loading the dishes, then it is worth checking and replacing the lock.

Repair work is carried out as follows:

• screws are unscrewed from the inside;
• then the connectors are disconnected and the control panel is removed;
• there are locking devices inside the panel;
• two screws are unscrewed with which the device is attached;
• then you need to disconnect the wiring and replace the old part with a new one.

The problem can also lie in the hinges, when the door locks well, but force is required to open it. This happens especially often if kitchen cabinets are attached to the appliance or if it is used incorrectly.

To replace the elements, you need to remove the top panel of the unit, for this you need to unscrew a few screws at the back. Then the bottom panel is removed from the front, and then the cover from the side. There will be access to the loop, the spring of which must be removed from the hook. Then remove the support washer and disconnect the loop from the body.

To install new parts, it is necessary to perform the previously performed manipulations in the reverse order. It is very important not to confuse the left and right elements, as they differ from each other.

Replacing the spray arm

If the machine makes unpleasant noises in working order, then, most likely, the malfunctions are associated with the rocker, it simply comes into contact with the edges of the dishes. There can be two reasons, one is due to wear of the nozzles, and the other is incorrectly installed plates or glasses.

To repair the sprinkler, it is necessary to remove it from the PMM housing and carefully inspect it. If the base of the nozzle is cracked, it must be replaced. To remove the faulty part, you need pliers, with which you need to grab and pull out the element.

Then you should install a new base, slightly press it down and cut a small hole in it, this can be done with an ordinary knife. Then insert a new product into this base until a special latch slams shut.

Module problems

If the control module is faulty, you will have to completely replace the main unit. It will not be possible to make repair work with your own hands.

To make a replacement, you need:

• unscrew the six bolts that fix the control panel, they are located on the inside of the door;
• then you need to slightly raise the door and carefully detach the control panel, you can hang it on the case for a while so that it does not interfere with the repair;
• then the black wire connected to the sensor is disconnected, the path to the module is open;
• it remains to unscrew the screws that secure the module to the panel and disconnect the board wiring.

You need to act very carefully, since some of the wiring is held with special latches, and they are very easy to damage. You must first squeeze them out. After that, you can attach the new module by doing the opposite.

Dismantling the heating element

If there were any power surges in the recent past, the relay on the board that controls the heater could burn out. That is why the dishwasher equipment stopped functioning. When carrying out repair work on your own, you need to be extremely careful.

The electronic module is an expensive part, so you need to act strictly according to the instructions, otherwise you can simply make it unusable.

First you need to remove the unit from the panel, and then release the latches and remove the control board. Examine her for burnt areas. Then they unsolder the relay contacts and legs and remove the part. Depending on the model range, there can be from two to four legs. A new element is installed and the structure is assembled.

It must be added right away that replacement can only be made for a similar product, which has the exact same serial number.

These are the most common breakdowns found in dishwashers. How to make repairs, independently or with the help of a specialist, everyone decides for himself. But as a rule, it is quite possible to fix most of the problems with your own hands at home.