Bosch dishwasher error codes

Speaking about display dishwashing machine models, the error codes of Bosch ones are generally standardized. But in the previous era, when indicators (LEDs) displayed errors, decipherment was much more complicated for users.

In fact, there was no notion of an error code in devices without displays: a particular combination of burning or flashing indicators corresponded to a problem. Although the set of errors was also the same, devices had many options for displaying them.

Each modern Bosch dishwasher model is equipped with self-diagnosis system. Actually, a user does not know about this system while the device works properly. However, when a breakdown occurs, the error codes of Bosch dishwashers appear on the display. Depending on the failure, these errors can appear alternately, or only one specific error lights up on the screen. In any case, to solve the problem, you have to decode the error.

In order not to repeat the description of the same error codes, they will be fully described only in the first code table for display dishwashing machines. All subsequent ones will refer to it since the set of codes for modern Bosch dishwashers is extensive enough to cover all previous versions.

Note! In some Bosch dishwasher models, F replaces the E letter in the error code, and the number remains the same.

Examples of control panels with display

control panels Bosch dishwasher with display

Control panels with indicators

Bosch dishwasher control panels with indicators

Error codes for Bosch display dishwashers

Bosch dishwasher errorcodes on display

Error codes are shown in alphanumeric format E <code> on Bosch dishwashers screen; At the same time, some models display the prefix “E” instead of the “F” one. Search for codes with both prefixes in the table below. Besides that, we decided to turn on the error message in dishwashers without a display. Thus, in the normal operation mode of the device, a Tap indicator blinks or lights if some problem appears. To clarify the error, switch to the diagnostic mode.

Even modern Bosch dishwasher models don’t display all error codes in the normal operating mode. The full set of them is available only in the service (test or diagnostic) mode, launched by a particular combination of buttons on the control panel. We’ll explain how to enter service mode in the next section.

Unfortunately, there is no single standard in the Bosch dishwasher error code system. We know a few code sets. In order not to litter the page by repeating the description of the same errors, I collected all the possible error codes. I will indicate if the same code means different errors. Please note that the E01 and E1 (without zero) codes mean different errors.

Water heating failure of a Bosch dishwasher

The first group of system errors is “water heating failure”. This group includes the following codes:

The heating element contacts are damaged or the integrity of the device is crippled. If the error E1 appears on the display, there is a high probability that the heating element has burnt. In this case, replacement is required. Anyway, start the test with the heating element. The temperature sensor must be checked as well as the heating element.

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System error E2 can appear alternately with the E1 error code. It indicates a malfunction of the water temperature sensor. In this case, the heating element operates at full power all the time, since the information does not come from the temperature sensor. To verify the malfunction cause, it is necessary to measure the resistance of the temperature sensor contacts using a multimeter (it should be approximately 50 kΩ).

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This code indicates problems with a direct flow water heater. The E09 error pops up in particular dishwasher models, where the heating element is located in a circulation pump. The problem can be solved by replacing the heating element, but first, you have to diagnose the device using a multimeter and make sure that it is broken.

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E10 error. Cause: Heating element problem. Action: Check for blockages/build-up/limescale that could be stopping water from interacting with the element properly.

The error E11 indicates that the power is not being supplied to the thermal sensor, or the connection between the control module and the temperature sensor is broken. The failure also indicates an impressive list of reasons, so you had better check it one by one:

  • temperature sensor contacts;
  • wiring leading from the temperature sensor to the damaged place;
  • control module contacts.

This code is displayed on some Bosch dishwasher models in the case if there is too much scale or dirt accumulated on the heating element. Sometimes after restarting the dishwasher, the E09 error appears instead of the E12 error, but it indicates the same problem.

Important! Some dishwashers are equipped with a particular heating element that can be removed, cleaned, and then installed again. After such fixing, the device will work properly.

Water drainage and water gaining failures of the Bosch dishwasher

Malfunctions related to the water heating are considered to be quite rare, but the error codes that report problems of water draining and gaining can be found more often. Let’s list the codes that inform about similar faults.

E03 failure stops the dishwasher operation if the appliance could not gain water in a specified period of time. In this case, the modern Bosch models automatically drain water, and then the E03 error appears on the display. If the Bosch dishwasher model was released 7-10 years ago, the situation can be different: the kitchen appliance shows the error code, and then waits for the end of the water gaining. What can be done in this case?

  1. Check water supply system for water.
  2. Check the filters for clogging. It is installed in front of the filling hose at the dishwasher entrance.
  3. Check the fill valve for a condition.
  4. Check the water level sensor for functioning.
  5. Lastly, check the pump for working, because in rare cases such error is caused by the pump failure.

The dishwasher reservoir is full of water. E05 error occurs when the dishwasher gains more water than necessary, and the water level sensor cannot stop this process in time. So, there are problems with the water level sensor. To eliminate the problem, you have to:

  • check the water level sensor tube for dirt and clogging;
  • check the contacts and wiring related to the sensor for burning;
  • check filling valve for any damages. Perhaps, for some reason, it can’t be blocked completely, and water continues to enter the dishwasher.

Important! In rare cases, such fault is caused by a malfunction in the dishwasher control unit. In this case, the help of a specialist is required.

E08 error is similar to another one – E03. The reason is the same – the dishwasher can’t gain the right amount of water on the pallet. This leads to the fact that the circulation pump cannot turn on and function properly, as well as the heating element. 

E13 Error. Symptom: Water temperature exceeding 75C.

Action: Have you connected your dishwasher to a hot water supply? If so switch to cold.

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Error E16 occur if the dishwasher cannot block the entering of water into the tank. There is an uncontrolled self-pouring of water into the appliance. Most often, the failure occurs if a clog entered an inlet valve with water and stuck there. It does not allow to the valve to close, so water constantly percolates through it, even if the dishwasher is turned off. So what to do to eliminate the E16 error?

  1. Check the fill valve for clogging and clean it.
  2. Check the water level sensor (only if the water does not flow by gravity when the machine is turned off).
  3. Check if there is excess foam from the detergent (if the error occurred during the dishwashing process).

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E17 Error indicates problems related to water gaining. This error is narrow-profile and most often means that the inlet valve overlaps are hindered or cannot be blocked at all due to an excessive water pressure. Sometimes a similar error can occur due to a water-hammer effect. In this case, just restart the device and it will work fine. If the pressure in the water pipe is too high all the time, partially shut off the water supply on the riser pipes.

Please note! In rare cases, when the E17 error appears, it is necessary to check the sensor that measures the amount of supplied water.

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E18 Error. Symptom: Water level too low (underfill).

Cause: Can be due to a problematic water valve.

E19 Error. Dispenser fault End of program Dispenser defective Check component Wires interrupted/broken Check wires

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E21 Error appears on the display if there are problems with the dishwasher’s pump and it refuses to drain water. When the error occurs, the pump is powered and it reacts with the control unit and sensors properly but does not perform its function. What could have happened?

  • The impeller has been jammed, and it does not rotate (possibly it was caused by foreign objects wounded around it);
  • The rotor has stuck to the sleeve walls. It needs to be cleaned and greased (in this case, the E21 may trench upon the E22 error code);
  • The pump mechanism has worn out and needs to be changed.

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Errors with clogging of the Bosch dishwasher

Errors related to a number of different types of clogging are found in Bosch dishwashers most often. Usually, blockages occur if the user neglects to clean dishes from food debris before putting it in the wash baskets. What systemic errors are related to the clogging?

The decoding of the code sounds like “a hole for water draining is blocked“. What does it mean? The dishes are not placed properly in the wash baskets, some of the objects covered the hole through which water is pumped from the dishwasher bunker. Also, the hole can be clogged with dirt.

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This error indicates that one of the dishwasher filters is dirty or there are problems with the pump (if the rotation of an impeller is hindered).

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F24 failure has a simple and understandable deciphering – the drain hose is bent or clogged, the sewerage and the drain outlet of the siphon are blocked. But in fact, the E24 error can occur for the most unexpected reasons. By the way, it may easily coexist with the E22 breakage.

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This error occurs when the pump nozzle or drain hose is clogged at the base. Therefore, the power of the drain pump is not enough. In order to squirt the dirty water, sensors signal to the control unit that shows the E25 error code and stops the dishwasher. To eliminate the problem, you have to clean the branch pipe and drain hose from the blockages and check the pump impeller.

Pay attention! Sometimes the E25 error boarders with the E22 one, that is, when the machine is rebooted, these failures occur alternately. In this case, it is necessary to check the impeller for rotations.

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Errors related to sensors and water switches in the Bosch dishwasher

The Bosch dishwasher is provided with a sufficiently large number of different sensors that help to control and operate the processes of implementing washing programs. When these sensors fail, the self-diagnosis system detects this and displays the following errors on the Bosch dishwasher display:

This error means that the sensor controlling the pressure and flow of water that is supplied to the sprinkler does not fulfill its functions. It is defective or just cannot work properly due to the clogging. It often happens that hard water causes clogging in the spray nozzles, and the water can’t enter through the damaged area, which leads to the E04 errors.

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The water quality sensor has failed. This is a special sensor that monitors the water quality in the dishwasher, which is installed next to the heating element. Sometimes it is possible to give the device a second life, changing burnt contacts, but in 95% of cases, replacement is required.

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E14. The sensor that controls the amount of water entering the dishwasher is not working properly. This malfunction can be fixed only by a specialist, and perhaps, the sensor requires replacement.

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E15 error appears in modern dishwashers equipped with the Aqua stop system if there is a water leakage. Act according to the following recommendations:

  • check the dishwasher tray for leaks;
  • check the hoses;
  • check other components for leaks.

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Cause: Water switch/regulator problem.

Action: Check water switch and replace if required.

Cause: Fault detected with turbidity sensor.

Symptom: Dishes not getting clean. Dirty water in the tub.

Errors related to an electrician in a Bosch dishwasher

Due to a large number of sensors, a modern dishwasher is provided with a complicated electrician system. The slight burning of a terminal or wipe of one of the numerous wiring lead to the following errors:

These errors indicate a failure in the electrical or in the dishwasher electronic system. First of all, the kitchen appliance has to be restarted by “on/off” buttons. As a rule, after this, the error is eliminated. If the breakage repeats many times, in order to avoid the occurrence of new problems, you need to turn off the device and call a specialist.

Important! You can try to find the cause of the problem by yourself, but in this case, you have to check all the wiring and terminals. To say the truth, this is a scrupulous and unpleasant work and there is no guarantee that you will find a malfunction.

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Symptom: Electrical short or break.

Cause: Short or break causing incorrect resistance in winding of the circulation pump or the motor.

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Cause: As error code E20, but this time the electrical problem is with the drain pump.

Action: Replace drain pump if necessary.

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If you connect the dishwasher directly to the mains, you may face the E27 error. Voltage drops that periodically occur in the network can have a serious negative impact on electrical appliances. It can even break the device at all. Therefore, if your dishwasher’s screen often shows the E27 error, connect the device to the network via a voltage regulator and the problem will be solved.

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Other error codes for the Bosch Dishwasher

If your Bosch dishwasher displays fault codes in a different format than E00 (such as on models with a full LCD display) then you might be shown the following fault codes instead.

Error CodesCause/Action
A or BCause: Fault with the water sensor. Action: Inspect dishwasher for evidence of leaks. Ascertain whether anti-flood protection has been activated.
CCause: Motor tacho fault. Action: Check motor and motor tacho wiring for problems.
DCause: Wiring/electrical fault related to motor triac. Action: Check wiring on/to PCB and motor. Check the triac (on the PCB).
ECause: Diverter valve fault. What is the diverter valve?: The diverter valve is used to send water to only the top or bottom rack when the half load option has been selected. Action: Inspect diverter valve and its wiring for problems.
FCause: Fill timeout. The required water level is not sufficient within six minutes of the start of the programme.
GCause: Diverter triac fault. Action: Check diverter triac (on PCB) and its wiring.
HSymptom: Dishwasher not heating. Cause: Possible problem with heating element or thermostat, or wiring issue.
KCause: Faulty thermostat sensor (NTC). Action: Inspect the NTC and thermostat, and their wiring.
0Cause: Pressure sensor fault. Action: Check the pressure sensor and its wiring.

Bosch WC160 Dishwasher Error Codes

Error codeError descriptionAdvice
**  *Inadequate water supply1. Make sure the water inlet tap is fully open 2. Close the water tap, separate the water inlet hose from the tap and clean the filter 3. Restart your machine, contact CDA service if the error resumes
 * **Continual fill errorClose the tap and contact service
  ***The waste water in the machine cannot be discharged.1. Drain hose is blocked 2. The filters of your machine might be blocked 3. Restart the dishwasher and cancel the programme 4. If the error continues, contact CDA service
* ***Heater errorContact service
 ****Alarm is active against water overflowTurn off the dishwasher and disconnect the water supply
*****Faulty electronic cardContact service
* * *Overheating error (temperature in the machine is too high)Contact service
*  **Faulty heater sensorContact service

Bosch SHX46A Dishwasher Error Codes

  1. While pushing (and holding) any two wash cycle buttons, turn the dishwasher on with the on/off switch. After releasing the buttons, LED “B” will be lit and LED “C” will flash, confirming you’re in the special programs menu.
  2. To enter the test program, push button “B” repeatedly until the digital display shows “P1” or until LED “C” is lit.
  3. Push button “C” to start the program — LED “C” will blink. The steps will show on the digital display (e.g.”S:01″) — push button “B” to skip a step.
  4. Stored error codes will show on the digital display and LED’s.

The test program can only be stopped/reset by pushing the on/off button – it can’t be done by turning off the power. Bosch SHX46A Dishwasher Error Codes Bosch SHX46A Dishwasher display

Led‘sDigital displayError codes
Off – Off – OffEONo errors
Off – Off – FlashingE1Heating error
Off – Flashing – OffE2NTC error
Off – Flashing – FlashingE3Filling error
Flashing – Off – OffE4Water switch error
Flashing – Off – FlashingE5Float water level or motor speed error
Flashing – Flashing – OffE6Aqua sensor error

Bosch SHE4AM12UC – Ascenta Dishwasher Error Codes

Dw symptoms (seen during wash cycles)Error code display (from cs test program)Error code led’s
(active / clean / sanitized)
No errorsE:00Off – Lit – FlashingNo errors.
Wash cycle abruptly ends with Clean LED glowing OR dw runs without heating (power module problem)E:01 pump starting / switching defect OR
E:02 defective working relay OR
E:03 defective heating relay
Off – Off – FlashingReplace power module (located in base).
Wash cycle abruptly ends with Clean LED glowingE:20 heat pump winding resistance is wrong ORFlashing – Off – Flashing1. Check continuity between heat pump (m2) and power module harness connector.
2. Measure heat pump resistance between any 2 terminals. If ~ 13Q @ room temp, replace power module. If not, replace heat pump.
 E:21 heat pump is blocked / clogged OR Remove debris / obstructions from heat pump. If pump impeller is stuck, replace heat pump.
 E:23 drain pump winding resistance is wrong ORFlashing – Flashing – Off1. Check continuity between drain pump (m3) and power module harness connector.
2. Measure drain pump resistance between any 2 terminals. If ~ 90Q @ room temp, replace power module. If not, replace drain pump.
 E:24 dw won’t drain OR Remove garbage disposal plug.
   Make sure drain hose is < 150” and includes a 20” high loop. Unclog house drain line.
 E:25 drain pump is blocked or sump drain pump cover is missing 1. Remove debris / obstructions from drain pump.
2. Remove sump drain pump cover and confirm drain pump impeller is turning freely.
3. Make sure sump drain pump cover is seated correctly
LED is flashing & dw can’t operateE:06 defective door latchOff – Flashing – OffCheck continuity between door switch (e1) and power module harness connector.
   Measure voltage across door latch connector. If > 10V, replace door latch. If < 10V, replace power module.
No heatingE:08 heat pump detects low water levelOff – Flashing – Flashing1. Check water supply & repair any leaks.
2. Check continuity between water inlet valve (s2) and power module harness connector.
3. Measure voltage across water inlet valve terminals (s2) during step 1 of customer service test program. If ~ 120V, replace water inlet valve. If not ~ 120V, replace power module.
 E:09 open heating element circuit OR Check continuity between heating element (r1) and power module harness connector.
 E:12 heating element resistances not balanced Measure heating element (r1) resistance, which should be * 5Q between terminals 1-2 & 2-3 and = 10Q between terminals 1-3 @ room temp. If not, replace heat pump. If so, replace power module.
 E:10 not enough heat 1. Decalcify heater with appropriate cleaner.
2. If problem persists after heating element has been decalcified, replace heat pump.
 E:11 NTC or NTC wiring harness error 1. Check continuity between NTC and power module harness connector.
2. Measure NTC resistance, which should be * 10kQ between terminals 1- 2 & 2-3 and * 20kQ between terminals 1-3 @ room temp. If not, replace heat pump. If so, replace power module.
 E:13 water too hot (> 75°C / 167°F) Make sure water inlet temp is < 75°C / 167°F.
Water doesn’t fill and drain pump runs continuallyE:15 float switch activated and dishwasher runs continuallyFlashing – Off – Off1. Remove debris / obstructions from drain pump / drain hose. Make sure float & float switch aren’t stuck.
2. Make sure water inlet valve isn’t stuck “open”.
3. Check float switch and wire harness (to power module).
Aqua sensor doesn’t run during wash cycleE:28 aqua sensor not properly calibratedOff – Off – Off1. Check continuity between aqua sensor (14) and power module harness connector.
2. Make sure aqua sensor is clean where it enters the sump.
3. If electrical connections are good and the aqua sensor is clean, replace the aqua sensor.
No powerHouse wiring isn’t 120V Check house wiring connections and if supply voltage is * 98 – 120VAC to power module harness connector.
 Open “On/Off’ OR “Start” switch 1. Check “On/Off’ switch & power module connections.
2. Measure “On/Off’ switch resistance. If it’s Q in “on” position, replace it.
3. If only drain pump is running, check if float switch has operated (see E:15 error code above).
4. If no LED’s flash when “On/Off” switch is pressed and the dishwasher door is open, replace operating module (in fascia panel).
Dispenser not operatingDetergent dispenser door jammed OR loose wiring connections Make sure dispenser detergent door isn’t jammed.
   Check connections between rinse-aid dispenser, dispenser actuator (a2) and power module harness connector.
   Check dispenser actuator operation while running customer service test program (steps 15 & 20). If actuator operates, but doesn’t open detergent dispenser cover, replace dispenser. If actuator doesn’t operate, replace power module.
Rinse-aid LED is glowingNo rinse-aid OR loose wiring connections 1. Refill rinse aid, if empty.
2. Check connections between rinse-aid dispenser (e3) & operating module harness connector (K12).
3. Measure voltage between outer most dispenser terminals (1-3 on e3). If ~ 13VDC, replace dispenser. If not, replace operating module.
No drying1. No rinse aid
2. Dispenser rinse aid setting = 0
3. Extra Dry Heat option hasn’t been turned on
 1. Educate customer on using and refilling rinse aid.
2. Set rinse aid setting to “4” if it is at “0”.
3. Activate Extra Dry Heat option, if it’s not activated and is available on the dishwasher.
Washability issue (heat pump runs, but dishes still dirty)1. Clogged spray arms or filters.
2. Spray arms not rotating
 1. Remove debris / obstructions from filter and spray arms.
2. Make sure spray arms are properly attached and rotate freely. Make sure spray arms are properly aligned with the supply tube.
Dishwasher won’t start1. Door is ajar
2. Heat pump has failed
3. Drain pump has failed
 1. Educate customer on closing door securely
2. Replace faulty heat pump
3. Replace faulty drain pump

Bosch SB series Dishwasher Error Codes

Error codesCauseRemedial  action
“Check water supply” display lights up.Supply hose kinked.Install supply hose without kinks.
 Tap turned off.Turn on the tap.
 Tap jammed or calcified.Turn on the tap.
  Flow rate must be min. 10 l/min., when water supply is open.
 Filter in the water supply blocked.Switch off the appliance and pull out the mains plug. Turn off the tap. Unscrew water connection.
  Clean filter in the supply hose. Screw water connection on again. Check for leaks. Reconnect power supply. Switch on the appliance.
Error code E:07Intake opening (on right inside of appliance) covered by utensils.Arrange utensils so that the intake opening is not obstructed.
Error code E:12Heating element calcified or soiled.Clean appliance with dishwasher cleaning agent or descaler. Operate the dishwasher with water softening system and check the setting.
Error code E:22 is lit.Filters [29] are soiled or blocked.Clean filters.
Error code E:23 is lit.Waste-water hose kinked or blocked.Install hose without kinks, remove any residue.
 Siphon connection still sealed.Check connection to siphon and open if required.
 Cover on the waste water pump loose.Lock cover correctly.
Error code E:25 is lit.Waste water pump blocked or cover on the waste water pump is not locked in position.Clean pump and lock cover correctly.
Error code E:27 is lit.Mains voltage too low.Not an appliance fault, have the mains voltage and electrical installation checked.
A different error code is indicated on the digital display. (E:01 to E:30)A technical fault has probably occurred.Switch off appliances with the ON/OFF switch [11]. After a short time restart the appliance.
  If the problem recurs, turn off the tap and pull out the mains plug.
  Call customer service and mention the error code.
Display flashes.Door not closed properly.Close the door. Ensure that no objects (utensil, fragrance dispenser) are protruding over the basket and preventing the door from closing.
Refill indicator for salt [6] and/or rinse-aid [5] is lit.No rinse aid.Refill rinse aid.
 No salt.Refill with special salt.
 Sensor does not detect salt tablets.Use different special salt.
Refill indicator for salt [6] and/or rinse-aid [5] is not lit.Refill indicator switched off.Activation/deactivation (see chapter “Water softening system/Special salt”
 There is still enough special salt/rinse aid available.Check refill indicator, levels.
Water is left in the appliance at the end of the programme.Filter system or area under the filters [29] is blocked.Clean filters and area underneath.
 Program has not ended yet.Wait until programme ends or reset.

Other Dishwasher Error Codes

Error CodesCausesTesting and troubleshooting
E1Heating error1. Most often this is a fault of the heating element – there is no resistance or leakage to the housing.
2. Faulty element on the electronic module responsible for the operation of the heater.
3. Check the safety thermostat.
4. Check flow sensor.
5. Check the pressure switch (water level sensor).
E2MTC sensor error (temperature sensor)1. The LCTS sensor is defective, which provides information to the PM control unit. It is usually located in a block with a Tan, has a certain resistance (~ 55kΩ at 21 ° C).
E3Problems with filling waterIf the desired water level has not been reached for a certain amount of time. Depending on the model of the dishwasher (PM), the sequence of operations will be different. Either the PM will wait until the filling is carried out (earlier models), or the water will drain for one minute (later models).
1. The hose “Aquastop” is defective.
2. Faulty water drain pump.
3. Check the intake valve.
4. Intake of the intake filter.
5. The pressure switch is faulty.
E4Problems with the flow switchThe water flow switch is not at the set position. It is responsible for distributing water to the sprinklers and is installed under the heating element.
1. Switch clogging.
2. Malfunction of the engine, which acts on the flow switch and sets it in one position or another.
E5Overfill level1. The pressostat tube is clogged.
2. The pressure switch is faulty (water level switch).
3. The inlet valve is defective.
E6Aquasensor ErrorAquasensor is an element that controls turbidity, stiffness, water contamination during rinsing at the initial stage. In the event that the dishes are dirty not much, it allows to exclude rinsing, saves water and electricity. Is next to Taine.
E8Low water level in the panThe heating element does not turn on. The circulation pump does not have enough water pressure and a pulse is applied to the module. Check the flow of water. A drain is also possible.
E9TEN errorMost often occurs in dishwashers with a flow heater, which is built into the circulation pump, when the heater breaks. Check the heater for an open.
E11Dishwasher works without a heaterCheck NTS sensor, electronic module, power wires.
E14Flow sensor errorThe flow sensor does not detect the control pulses, but they flow to the circulation pump.
E15AQUASTOPThere was a leakage of water. Check the water in the pan. The reasons for the leakage may be different.
E16Unauthorized water setCheck the intake valve (flow sensor). Check the pressure switch (level sensor). One of the possible options is increased foaming.
E17Water Failure ErrorCheck the flow sensor. It is also possible that the inlet pressure is too high.
E18 Do not turn off the power. The program will end after draining the water.
E21Problems with the drain pumpThe drain pump is blocked. Check the impeller for any foreign object. If there is no blockage, the pump is likely to be worn and can sometimes jam during rotation – it must be replaced.
E24Error in draining the waterThe hose for draining dirty water is clamped or broken.
E27Undervoltage in the networkCheck the voltage in the outlet. The error often appears during peak hours on urban power networks, for example in the evening. As an option – put the voltage regulator.