Error E14 on a Bosch dishwasher

A common error code, E14, prevents Bosch dishwashers from working. The "home assistant" freezes shortly after starting the cycle. Let's explore what causes this error code, how to fix the problem, and what tools and components you'll need for repairs.

Probable cause of the problem

Modern Bosch dishwashers are equipped with a smart self-diagnostic system. If a malfunction occurs, the dishwasher immediately detects the issue and notifies the user. Error E14 The dishwasher informs about the failure of the water flow sensor. This element acts as a pressure switch and is installed on devices with a flow-through heating element.

Another possible cause of the error could be an open circuit in the flow sensor-control module circuit. Therefore, you'll need to check the wiring and connections. The error code may also indicate:

• lack of pressure in the system (or, conversely, its excess);
• breakage of the intake valve;
• damage to the control board.

If the error E14 occurs, you will need to check the water flow sensor, its supply wiring, the intake valve, and the electronic control module.

In 90% of cases, this error code is caused by a faulty flow sensor. Therefore, the first thing to check is the flow meter in your Bosch dishwasher. We'll explain how to diagnose it and, if necessary, replace the component.

Checking and replacing the flow sensor

Most modern Bosch dishwashers, instead of the usual pressure switch or in addition to it, are equipped with flow meters. The purpose of the flow sensor is to record the amount of water collected and to determine the pressure at which the liquid enters the machine. If the pressure is low, or, on the contrary, too strong, the “brain” can also display error E14.

The flow meter is a plastic part, inside of which are located:

• propeller;
• magnet;
• reed switch (this is a glass bulb with contacts hidden inside).

The flow meter operates on a fairly simple principle. Water passes through the element, and the propeller begins to rotate, bringing the magnet close to the reed switch. Through a pulsed connection, the control module detects the amount of water being poured into the machine and records its volume.

The flow meter protects the dishwasher from water overflow.

You don't need to remove the flow sensor from the dishwasher to diagnose the problem. Simply power off the machine, disconnect it from the utilities, and remove the side panel. The flow sensor is easy to locate—it's a fairly large plastic part connected by a hose to the inlet valve.

To test the flow sensor, you'll need a multimeter. Set the tester to continuity mode, then place its probes on the component's contacts. The measuring device should display an infinity sign.

Next, hold the magnet close to the flow meter. The multimeter should then display a reading. In this case, the sensor is working properly. If the tester still displays an infinity sign, the component is likely broken.

To reset the error, you'll need to replace the sensor. You can purchase a new flow meter at a specialist store or order it online. When choosing components, pay attention to the model and serial number of your Bosch dishwasher.

Sometimes, even a functioning flow meter detects water pressure that's too low or too high. In this situation, for safety reasons, the dishwasher's "brain" stops operation, displaying an error code. Therefore, it's worth checking whether the water pressure in the water supply system is normal.

We are solving the valve issue

Sometimes the problem may not be with the flow sensor, but with a lack of water supply to the system. This can be caused by a pinched inlet hose, a clogged mesh filter, or a broken inlet valve. Each component will need to be checked.

The easiest way to check your Bosch dishwasher's inlet hose is to check that it's not kinked or pinched by anything. Also, feel it for any blockages.

Next, check the mesh filter. It's located at the entrance to the dishwasher, where the inlet hose connects. The mesh becomes clogged with debris, limescale, and scale, preventing water from passing through. Clean the element and replace it.

Finally, the inlet valve is checked. To diagnose it, you'll need a special device—a multimeter. To access this component, you'll have to partially disassemble the Bosch dishwasher, so be sure to have a screwdriver handy.

What to do next? The instructions are as follows:

• unplug the dishwasher;
• turn off the water supply to the machine;
• disconnect the device from communications;
• move the dishwasher to a place where it will be convenient to work with;
• remove the right side panel of the dishwasher housing by unscrewing the bolts that secure it;
• Find the solenoid valve.

The inlet valve is located at the bottom of the Bosch dishwasher.

The component is diagnosed using a multimeter. The tester's probes must be placed against the component's contacts. A good intake valve should show a resistance of 500 to 1500 ohms.

If the needle on the multimeter display doesn't move, the coil may be broken. The solenoid valve cannot be repaired and will need to be replaced. Parts are purchased specifically for the Bosch dishwasher model. It is recommended to purchase original parts rather than generic ones.

Take a photo of the wiring diagram for the valve, then remove the faulty component. Next, secure the new component in place and connect the hoses and wires to it. Then, replace the dishwasher body and run a test wash. If the problem was a faulty solenoid valve, you should be able to reset the error.

The control board does not see the flow meter.

If neither the flow sensor nor the inlet valve are at fault, you'll need to check the dishwasher's electronic control unit. Very few people can diagnose the control module, much less repair it. Therefore, in this case, it's best to contact a service center.

The control module is the "brain" of the dishwasher. The electronic unit itself is small, but it consists of numerous circuits, microchips, and semiconductors. Typically, it's not the entire board that fails, but only a specific section. Sometimes, you can detect the defect simply by looking at the microcontroller. What should you do in such a situation?

To inspect the control module of a Bosch dishwasher, you need to:

• de-energize the equipment;
• disconnect the machine from the sewer and water supply;
• open the dishwasher door wide;
• unscrew the screws located on the inside of the door and on the sides;
• remove the upper part of the dishwasher door.

The electronic unit is located inside the door. There's no need to disconnect the wiring or remove the circuit board from the machine. Simply inspect the module for burns, swelling, and rust. If everything appears to be in order, call a technician for diagnostics.

If your dishwasher is under warranty, don't even try to troubleshoot the problem yourself. It's best to have it diagnosed immediately. Service center specialists will inspect the appliance and repair it free of charge.

   

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