Details: bosch wfb 1070 DIY repair from a real master for the site my.housecope.com.
In this article we will tell you how to independently repair Bosch washing machines (Bosch). Find out how to fix light and moderate breakdowns without resorting to the services of a master.
Bosch washing machines attract attention and deserve the respect of customers due to their high quality and an abundance of innovative technologies. The German assembly fully justifies the price of such washing machines - high-quality materials are used in the manufacture, and the developers prefer ergonomic forms. But even among the highest quality equipment, breakdowns are not excluded.
Bosch washing machine diagnostics is a built-in function in all modern washing machines. Thanks to her, you can determine the essence of the breakdown without calling the workshop. If you did not find in the instructions a step-by-step description of how to diagnose yourself, we will describe in detail how to do this:
Close the loading door.
Set the program selector dial to OFF.
Wait a couple of seconds.
Set the selector to the "SPIN" mode.
If you did everything correctly, the "START" light will blink.
Press the "SPIN ROTATION" button and do not remove your finger until the "START" indicator flashes again.
Turn the wheel again, this time stopping it in the "DRAIN" program.
Attention! Rotate the selector to the right only.
After releasing the SPIN ROTATION button, select the object to be tested by turning the wheel. Or determine the breakdown by the error code displayed on the scoreboard.
Important! If the diagnostics do not start, then the problem is in the control board (electronic controller), and in this case you cannot do without calling the wizard.
Video (click to play).
If you decide to manually check individual parts, turn the selector wheel to select the desired item. Proceed in this way:
Checking the engine: position 3.
4 - for testing the pump.
5 - check the heating element.
6 - hot water intake valve.
7 - cold water intake valve.
8 - water intake valve for the main wash.
9 - valve for intake of preliminary wash water.
10 - sound signals.
11 - FCW autotest.
14-15 - "fast" autotest.
Then press "START" again (in addition to this indicator, "DRAIN" and "SPIN" are also on) to start the program test.
To exit the program test mode, press START and turn the wheel.
To exit Diagnostic Mode, turn the wheel to the OFF or OFF position.
Of the entire huge list of malfunctions of the Bosch washing machine, the most typical for this brand are the following failures:
Water is not heated during washing.
No drain.
The tank is not spinning.
The drum is noisy.
No water intake.
The engine does not work.
Based on the specified list, we come to the conclusion that the most vulnerable point of this brand of washing machines is the heating element. If the thermoelectric heater burns out, but the controller is intact, then repairing a Bosch washing machine does not take much work and effort. Otherwise, the controller needs to be replaced, and it is best to entrust this work to a specialist.
Users learn about certain malfunctions by fault codes (or flashing lights). In CM Bosch, the following error codes usually appear: F01, F16, F29, F31, F34, F36, F40, F61, F63, as well as E02 and E67 and others.
The device of the Bosch washing machine determines both the nature of the breakdowns and the reasons for their occurrence. Let's take a look at what usually causes the crashes.
There is waste water in the tub after washing. This happens for the following reasons:
Failure of the drain pump (pump).
Clogged filter or pump.
Burned out or oxidized pump contacts.
The pressure switch has broken.
If the drum is dead, it may be due to the following reasons:
The drive belt is damaged.
Electronics malfunction.
Less commonly, the engine crashes.
Broken bearings (you will need to replace the bearing in the Bosch washing machine).
Debris and foreign objects in the tank.
Loose or broken shock absorbers.
Torn off counterweight.
Water does not flow into the drum because:
There is no water in the water supply system, low pressure.
Pump or Aqua-Stop system clogged.
Kink in the drain hose.
Engine breakdown coincides with the following "symptoms":
Having determined what caused the malfunction, and assessing its complexity, you can start self-repairing Bosch washing machines.
If you have not identified a breakdown, and do not know how to repair the washing machine, contact a specialist.
The listed causes of breakdowns are most typical for the Bosch Classic 5, Bosch Mahh 5, Bosch Max 4, Bosch Maxx 6 models, but other models can fail for the same reasons.
Below we will look at the faults and how to fix them, focusing on the most common faults and the best ways to solve them.
Having determined that the drain pump (pump), drain filter or water level sensor (pressure switch) needs repair, we carry out the repair ourselves - this does not require special knowledge and effort.
To eliminate filter clogging, we act according to the following scheme:
Let's find a drain filter: it is located at the bottom of the washer body, under the front panel (can be reached from the bottom by laying the machine on its side) or behind the door of a small technical hatch.
You need to spread a rag or substitute a container - the remaining waste water will pour out of the hole.
By turning the filter cover to the left, remove it.
We clean the filter and rinse it under the tap.
We put in place. Remember that you MUST NOT run the CM without a filter.
To clean or replace the drain pump (pump), you need to properly remove the front panel; for this you may need instructions for your Bosch washing machine. In principle, nothing complicated, but you need to make an effort.
Remove the detergent drawer.
Unscrew the bolt in the lower right corner.
Remove the bottom panel by unscrewing the bolt near the filter and the bolts at the bottom of the panel.
Remove the rubber cuff of the hatch (for this you need to remove the retaining ring by bending the small spring with a slotted (minus) screwdriver).
Remove the panel.
To get to the pump itself, remove the UBL wires. Remove and disassemble the pump - it may contain foreign objects and debris. The impeller in a serviceable pump turns easily in all directions.
Check the resistance of the pump winding. If it is 200 ohms - order. If the values are different, there is a breakdown, and you need to change the pump.
If water is not collected, you need:
Check if the machine is connected to the water supply (if not, open the valve).
Inspect the drain hose (it may be kinked or kinked).
Check the "AQUA-STOP" filter. If there are problems with it, you need to replace it with a new one.
If the water level sensor breaks down, we change it according to the following scenario:
We find the sensor by removing the top cover of the car - you will see it in the right corner when you look at the car from the front. To remove the cover, twist 2 bolts.
Pressing the latch, remove the sensor. We remove the wires and disconnect the branch pipe by opening the clamp.
We install the new unit in place of the old one, proceeding in the same way, but in the reverse order.
If the heating element has worked out its resource or is overgrown with scale, overheated and burned out, you need to change it. This work can be done on your own. But first you need to check.
If you are not sure whether the heating element is working or broken, you can check it yourself, armed with a tester. The check is carried out as follows:
Without removing the heating element, disconnect the wiring.
Set the tester to measure resistance (in ohms).
Set the adjuster wheel to “200”.
Attach the test leads to the electrical heater terminals.
Normal resistance usually ranges from 20 to 40 ohms.
If the tester display is "1", then there was a break, and the heating element needs to be changed.
If the value is about "0", there is a short circuit in the heating element, the heater needs to be changed.
Finding the heating element is simple: remove the back panel of the CMA and below under the drum you will see the heating element, or rather its shank, with a screw driven in the center. We make a replacement:
Unscrew the bolt.
Remove all wires carefully.
Remove the heater by slowly swinging it from side to side and pulling it towards you.
Take a working heating element and install it.
To carry out this complex operation, an almost complete disassembly of the CM is required. If you decide to do this, do not completely remove all the wires from the electronic module - it is not a fact that you will be able to connect everything in place. After dismantling the module, lay it on the frame or hang it on a special hook.
To make a technological hook with your own hands, take a 30-centimeter piece of non-heated steel wire with a diameter of 3 mm or more. On the wire, you need to string a cambric (heat shrinkage), which should be longer than the wire - at least 1 cm on each side. Make bends, stepping back 6-7 cm from each end of the wire - you will get a kind of hook. Hang the dashboard on this hook.
We remove the tank with a drum by unscrewing the springs.
When disassembling the tank into 2 parts, the specially provided latches must be broken.
Taking a hammer and a wooden backing, carefully knock out the bearing axle shafts with light blows.
When choosing new bearings, pay attention to the fact that the parts correspond to your brand of washing machine. For example, you need bearings for a Bosch Max 5 washing machine - say so in the store so as not to buy the wrong parts.
The video shows how the master disassembles the Bosch machine and changes the bearing. See if this is useful to you:
As you can see, repairing Bosch washing machines with your own hands is a completely doable task. Just remember to periodically clean your washer and maintain it to keep your washer from breaking down.
Household appliances from Bosch have earned the love of customers for their quality. German-assembled washing machines evoke admiration, ranging from the quality of the materials used for the production of machines and ending with their ergonomics. However, even among this technique, there are copies of machines that fail. That is why, we decided to write an article on how to repair Bosch washing machines on our own, and whether it is possible to do it.
Modern models of machines from Bosch are equipped with a special program that allows you to identify equipment malfunctions without contacting the master. The instruction manual will probably tell you how to make such a diagnosis correctly. If not, then we offer a detailed algorithm for testing machines, in the case when the drum has stopped rotating:
Close the drum door of the machine.
We put the program selection knob on the "Off" position.
We are waiting for 2-3 seconds.
Now turn the knob to spin mode.
We are waiting until the "Start" button on the machine's control panel flashes.
Hold down the "Spin speed" button.
We are waiting until the "Start" button flashes again.
We turn the knob to the "Drain" mode. Important! You need to rotate the handle clockwise.
We release the button "Spin revolutions".
By the error code of the Bosch machine, we determine the last malfunction.
For your information! If the washing machine diagnostics did not start at all, then there is a malfunction in the system board.
In addition, the program provides for deleting the last error from memory and starting diagnostics of faulty elements. To start the engine check, you need to set the mode selector knob to position 3. When the knob is set to position 4, the drain pump will be checked, and in position 5 - by the heating element. Positions 6 and 7 are intended for diagnostics of hot or cold water inlet valves, in position 8, testing of the water inlet valve will start during the main wash, 9 - preliminary.
The masters of Bosch service centers found that of all possible breakdowns of washing machines, the following malfunctions are most often encountered in Bosch machines:
The water does not heat up during washing.
Water does not drain.
The drum does not rotate.
Noise inside the drum.
No water is drawn.
The engine will not start.
Based on this list, we can conclude that in washing machines of this company, the heating element most often burns out. If Teng burned out, and the electronic system remained intact, then the repair will be carried out quickly and safely. Otherwise, you will have to change expensive electronic modules, giving the technician to the master.
What malfunctions can occur in the washing machine, everything is clear. And what can cause a breakdown, you need to find out. Let's deal with everything in order.
If the machine does not drain the water after the wash cycle, this may be due to:
breakdown of the drain pump (pump);
clogged drain filter or pump;
contacts between the pump and the power supply are faulty;
the water level sensor is out of order.
In the case of stopping the drum, the most important reasons are:
wear of the drive belt;
malfunction of the electronics or control board;
it is very rare that the engine breaks down in such machines.
Drum noise can be caused by:
faulty bearings;
a small object stuck in the drum;
breakage of shock absorbers;
torn off counterweight.
When water is not collected in the washing machine tank, the following reasons are distinguished:
lack of running water;
blockage of the pump or Aqua stop system;
occurred by the kink of the drain hose.
The engine of the Bosch washing machine may not start due to a breakdown in the electronics or an open drum door... Having found out the cause of the breakdown and its severity, you can start repairing yourself.
If the breakdown is still not determined, we turn to the master.
Now we will describe in detail what malfunctions can be eliminated with our own hands, how to repair a car. Let's start with the simplest thing - a clogged drain filter. It is located at the bottom, under a panel or cover. To rinse it from accumulated debris, you need to open the lid by gently turning it counterclockwise. Be sure to use a large rag to prevent any leftover water from spilling onto the floor. Rinse the filter under running water and reinstall.
Cleaning or replacing the drain pump will not be complete without removing the front cover of the machine. This process is simple, but time consuming. This work is described in detail in the article on how to repair a pump in a washing machine.
With your own hands, you can eliminate the malfunction associated with the fact that water is not collected. First, we check if the water supply is turned off and if the water supply valve is open. Then the drain hose is inspected for kinks, and only then can the Aqua stop filter be checked. If it is not working properly, then it is necessary to replace it with a similar one.
If the water level sensor is broken, it must be replaced. The sensor is located under the top cover in the right corner. To remove the cover, it is enough to unscrew the two self-tapping screws from the back. The sensor itself is pulled out by pressing the latch. Then the hose is removed and the contacts are disconnected. A new one is installed in place of the faulty water level sensor.
How to replace a heating element in case of a breakdown? A similar malfunction can also be eliminated by hand. Opening the back cover of the washing machine, below, under the tub, you can see Teng. To replace it you need:
Unscrew the bolt holding the heating element to the tank.
Disconnect all wires.
We take out the ten.
We take a working ten.
Putting it all in reverse order.
More difficult is the job of replacing bearings in a Bosch washing machine. After all, you will have to almost completely disassemble the washing machine to get to them. In addition, tools and dexterity are required. A detailed video was filmed about this. All works in it are made by real masters.