Bosch SMS Series Dishwasher Fault Codes



E01

Power module failure!
All codes E01, E02, E03, E04 and E05 all indicate a power module failure.
This is not a fault that can be repaired by the owner as the modules have to be configured in order to operate, please see the information notes below.
As far as we are aware many models of Bosch either are or, will be set up this way in order to eliminate the possibility of DIY or third party repairs to these appliances.

E06

Door switch fault
This fault code will usually do what it says and be telling you that the door switch, the one used to tell if the door is closed and the lock engaged, is faulty. However, this series of Bosch dishwashers also do get the handles broken from time to time and this could be a cause, you can find a commonly used door handle here.

E07

Dryer fan faulty
Essentially this error code states that the dryer fan, used for fan drying in some models, is faulty or not operating for some reason.

E08

Heat pump has detected too low a water level in the tub
By heat pump we assume the water heating element as that's al that makes sense. Assume that a new heating element will not be a cheap item to buy and they are pretty specific to production within the series and it is better to check with us for the correct element.

E09

Heating circuit fault
As above, this is most probably going to be an issue with the heating element as the thermistors have their own fault codes below.

E10

Heat pump scaled up
Quite how the dishwasher senses this is not known but it would seem to indicate a poor flow of water through an instantaneous heater in the dishwasher as that would seem the only logical way in which this could be detected. This would assume that the inside of the heater was choked with limescale or, blocked in some other way, preventing the correct flow of water through the heater. A poor flow of water could cause the element to overheat and fail.

E11

NTC thermistor fault
This error code can be caused by the thermistor or the wiring to it being faulty.

E12

Not used
Seek engineer if displayed.

E13

Hot water inlet temperature too high, greater than 75˚C
Generally seen if connected to a hot water supply, if not it could indicate a sensor or board failure.

E14

Reed switch flow sensor fault
Please check with us for these parts but we would suggest that you seek a profession engineer if this error code is displayed.

E15

Water in base
Float sensor in the base has been activated. You can try to empty the base and restart the dishwasher as you will find noted many times in the forums but, if there is a leak this error code will simply be displayed again, you must find the cause of the leak.

E16

Inlet valve fault
This would indicate the lack of incoming water, which will ordinarily be caused by a water inlet valve having failed.
Bosch dishwasher inlet valves are not cheap and are often quite unique to Bosch, the popular SMS valve we use is this one but, do check with us and have the ENR number from the rating plate of the dishwasher so we can identify the correct water valve for your dishwasher.

E17

Water level too high - flow sensor
The dishwasher has, for some reason detected an overfill and is reporting that through this error code. The flow sensor note is there as that can cause this fault code to be displayed.

E18

Water level too low - valve
As above only in reverse, the machine has not filled with enough water and this can be caused by the water valve.

E19

Not used
Seek engineer if displayed.

E20

Winding resistance of circulating pump fault
The electronic controlled has detected a short or a break in a winding in the main recirculation pump or main motor of the dishwasher.

E21

Circulating pump blockage
This would be caused by a blockage or a poor water flow from the main motor of the dishwasher. This can be caused by a capacitor failure or for other reasons.

E22

Not used
Seek engineer if displayed.

E23

Winding resistance of drain pump fault
The controlled has detected a break or short in the drain pump wiring. Many of these dishwashers use this pump which is a cheap compatible one.

E24

Drain filters blocked
Clear the filters. Generic instructions to clean your dishwasher filters is available from here.

E25

Drain pump blocked or pump cover missing
This can be caused by the above or by, as the fault code indicates, a blocked drain pump.

E26

Water switch fault
There is little details on this error code.

E27

Not used
Seek engineer if displayed.

E28

Turbidity sensor fault
We would strongly advice seeking an engineer for this fault as well as it is often not easy to understand or diagnose issues with turbidity sensors.