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Getting ready to take your clothes out of the washer and see that the drum is full of water? The cycle should already end, so what’s the problem? The fact is that the washing machine Bosch does not drain water. If you know where to look for a problem, the operation of the equipment can be quickly restored. Check out the causes and solutions for the problem.
Why does Bosch CMA not drain water?
It is worth starting the check with typical problems that could lead to a drain stop. Look at the control panel. Make sure No Drain is selected. Then check in the following order:
- Examine the drain hose. It should lie flat, without kinks.
- Disconnect the hose from the housing and lower it into the sink.
- Start any mode.
- If water flows out of the hose, then the cause is a blockage in the sewer system.
You can clean the sewer with the help of special tools or by calling a plumber.
If the modes and communications of Bosch Max 5 (Maxx 5) or another model are in order, then the matter may be in a serious breakdown. Usually, an electronically controlled machine displays an error code on the display. Having learned its value, you can come to the conclusion about the location of the malfunction. But if there is no code, then you have to check in order:
- drainage filter and pipe for blockage;
- pump at the time of breakdown;
- water level sensor for malfunction;
- electronic module for burns and damage.
To find and fix a breakdown, start by diagnosing the internal parts of the washer.
How to drain water from a Bosch washing machine?
Have you ever cleaned the drain filter? If not, then the likely cause of the problem is a clogged part. The filter protects the pump from debris: small parts of the wardrobe, coins, hair, threads. Waste water passes immediately through the filter system, and then is pumped by the pump and goes into the sewer.
In machines manufactured by Bosch, including Bosch Max 4 (Maxx 4) models, the filter is hidden in the lower right corner, under the loading hatch. Here’s what you need to do to drain the water and remove the blockage:
- Open the plinth panel (it can be small or long). Pry out the latches with a flathead screwdriver.
- Substitute a flat container.
- Turn the plug counterclockwise.
- Take out and clean the filter.
At the same time, water will drain from the tank, and you can get the laundry. Also remove dirt from the mounting hole and check the pump impeller.
Blocking the part with foreign objects leads to a stop in the drain. After that, proceed to inspect the internal details.
Pipe cleaning
Everything that passes through the filter mesh enters the nozzle. The element comes in conjunction with the pump, so consider how to get to the pump. In most Bosch models, the bottom is removable, but the cross bar prevents access to parts. So do this:
- Pull the plug from the socket, disconnect the machine from communications.
- Close the inlet valve.
- Remove the dispenser tray by pressing the latch in the center.
- Remove the two screws on the back and slide the top cover off the case.
- Unscrew the bolts around the perimeter of the rear panel, remove to the side.
Below the tank is a drain system assembly.
Spread a rag and wring out the pipe clamp. Remove the element from the seat and clean from blockage. You can completely disconnect the nozzle from the machine and rinse with warm water.
Replacing the pump
The path to the pump has already been completed, it remains to check the node for serviceability. When the washer is running, the pump may either hum or make no sounds, but it will not pump out the liquid. If the impeller is not blocked, then it is worth ringing the electronic winding.
Progress:
- Unclip the drain hose clamp and disconnect from the pump housing.
- Disconnect the pump wiring, turn it to the right and remove it from the machine.
- Turn on the multimeter. Attach the probes to the winding.
- Readings from 0 to 1 ohm indicate a blown winding.
- A three-digit number indicates that the part is working.
In the event of a breakdown, buy the original assembly specifically for the Bosch Maxx washing machine or another model. Installation is carried out in the reverse order.
The video shows how to get to the pump through the dismantling of the front wall:
Checking the level sensor
The pressure switch (aka level sensor) is used to measure the amount of water in the tank. When a part fails, it can send incorrect signals to the module or not work at all. As a result, the control triac does not give a signal to turn on the pump.
Checking the sensor is carried out as follows:
- Remove the top cover of the CMA.
- At the side wall there is a small round part with outgoing tubes. This is the pressure switch.
- Disconnect the sensor contacts and hoses.
- Loosen the fixing screw.
- Inspect the tubes, they may have a blockage.
To check the pressure switch, connect a tube to it and blow into it. If clicks are heard at the same time, then the part is working. If silence – replace the pressure switch.
Level sensor failure is a fairly rare failure. But with the exception of other problems, it is worth checking the pressure switch.
All elements checked and cleaned, but the machine did not start normal operation? What to do? Probably a problem with the firmware of the control module. Many users complain about a similar problem in the Bosch washing machines of the Russian assembly. Of course, you cannot perform a flashing on your own. Therefore, you need to call the master. Repair will take no more 20-40 minutes.
As you can see, most problems with the lack of a drain are solved without contacting a service center. How to avoid problems? Follow simple rules:
- Check items carefully before loading them into the drum.
- Clean the drain filter every one to two months.
- Follow the correct connection of communications.
- Install a voltage stabilizer.
Many users neglect the last point – but in vain. Once you install the stabilizer, you will protect the washing machine and other equipment from power surges.