If your Bosch dishwasher is displaying an error code, usually an E with a number, the dishwasher’s control board has detected an issue that needs to be resolved. The error code will give you a good idea of the problem and the component you need to look at, but it isn’t always specific, so some troubleshooting may be required.
GM926710, SHE43P25UC/64, SHE45M05UC/50, SHE45M05UC/50, SHE45M06UC/50, SHE45M06UC/50, SHE4AP06UC/06, SHE4AP06UC/06, SHE55M12UC/64, SHE55M15UC/64, SHE55M16UC/64, SHE55M16UC/64, SHE58C05UC/48, SHI4302, SHI4306, SHI6802, SHI6805, SHI6806, SHU9915UC/11
SHX43C05UC/46, SHX45M05UC/50
A Bosch dishwasher error code E01, E02, E03, E04, or E05, refers to a power module failure, i.e., a control board issue requiring specialist attention. Bosch recommends calling its customer service at 1-800-9442904 or a Bosch certified technician to fix the problem.
An E01 error code usually refers to a pump control circuit failure on the main control board. With some models, the issue can cause a lack of water in the dishwasher, which stops the heater from running and triggers the error code.
The E02 error code indicates that the heater relay on the control board has a fault. With some models, the error can be caused by a faulty temperature sensor or thermistor.
If you do not want to pay for a Bosch technician, you could replace the temperature sensor or thermistor to see if it resolves the error code. Replacing the control board is also an option.
An E03 error code most likely refers to an auxiliary heater relay fault on the main control board. However, with some models, it may indicate that the water inlet valve needs to be replaced because the dishwasher cannot fill with water.
If the dishwasher is not filling with water, you can try replacing the water inlet valve before calling a Bosch technician to repair or replace the control board.
The E04 error code usually refers to a heating issue, which is difficult to diagnose and requires a trained Bosch technician. With some models, it may indicate that a spray arm is clogged and needs cleaning, or that the water flow sensor needs to be replaced.
The most likely cause of the E05 error code is a water switch Triac fault on the main control board. In some cases, the error code indicates a damaged float or defective float switch. Before contacting a Bosch technician, you could replace the float and/or float switch to see if it resolves the error code.
Depending on your model, the dishwasher door may not be closing properly, or the aqua sensor may have a fault. A door mechanism failure is most likely, but unfortunately, the sensor is difficult to access, and a door mechanism failure can be difficult to diagnose.
The aqua sensor (also called the turbidity sensor) monitors the water quality, such as whether the water is clean or dirty. Checking the aqua sensor requires dismantling the dishwasher to locate the sensor on the circulation pump.
If the door is closing and locking, the sensor switch that monitors the door may be faulty and need to be replaced, or the main control board may have a fault that requires a Bosch technician to diagnose and fix.
Either the drying fan or wiring from the control board to the drying fan needs to be checked and potentially replaced.
The water level unexpectedly dropped during the cycle. Check for overturned dishes collecting water or a water supply issue.
The main control board may have a heater relay fault, or the heater may be defective. The heater’s resistance can be checked with a multimeter to determine if it has failed. A trained technician will need to check the control board.
The water heater may be affected by excessive limescale, or it may be defective. Deep cleaning and descaling the dishwasher may resolve the issue, or the heater may need to be replaced.
The resistance of the thermistor (integrated into the heat pump on newer models) or the NTC (temperature sensor) needs to be checked to diagnose the issue (see the tech sheet for the required resistance).
Check the dishwasher is getting cold water and that the temperature sensor does not have a fault (check the sensor’s resistance with a multimeter).
The dishwasher’s flow meter (also called a reed switch) is not detecting that water is entering the dishwasher. The most common cause is a faulty flow meter. The flow meter is located on the heat exchanger and can be relatively easily removed and replaced to resolve the error code.
First, determine if you can see where the leak is coming from. If the dishwasher does not appear to be leaking, the flood sensor in the drain pan underneath the tub may be defective. Otherwise, a hose may be loose, or a gasket or spray arm may be damaged.
The dishwasher is filling with water when it shouldn’t. Replace the water inlet valve to fix the issue.
The E17 error code means the dishwasher is not filling with water. Check that the water supply line is turned on and not kinked. If the issue remains, replace the water inlet valve.
Check the heat pump (E20, E21) and heat exchanger (E19) for faults.
The dishwasher’s filter needs to be emptied and cleaned of debris.
If you can hear the drain pump working without issue, check that the drain hose is not clogged. The drain pump can be inspected for a mechanical failure or tested for an electrical failure with a multimeter continuity test.
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