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Bosch Dishwasher Error Codes Explained: Causes, Symptoms & Fixes
A Bosch dishwasher error code can point to a problem with water intake, leakage protection, heating, drying, drainage, door sensing, voltage, or electronic communication. This guide explains how common Bosch dishwasher error codes can be grouped, what symptoms may appear, and when a homeowner should request professional service.
Bosch Dishwasher Error Codes and What They Indicate
A code is a diagnostic direction, not a complete repair answer. The same display may be caused by a failed component, damaged wiring, restricted water flow, or an issue in the electronic control system. Code meanings can also vary by model, so the dishwasher’s E-number should be checked before parts are replaced.
Control Board, Sensor, and Communication Codes
Codes E01, E02, E03, E04, E05, and E06 mainly concern electronic control, heater electronics, the wash-arm diverter circuit, or the door sensor. Their extended equivalents include E0100, E0103, E0105, E0106, E0107, and E0110.
Bosch identifies these codes as faults involving the heat-pump motor circuit, control-board relays, heater electronics, diverter control, door sensing, or communication between electronic components. E8000 also points to the door-sensor circuit.
These faults may cause the dishwasher to stop before starting, reject cycle commands, wash unevenly, or end a program without completing every stage. Because these codes involve powered components and internal wiring, repeated resets should not replace proper diagnosis.
Heating, Heat-Pump, and Drying-System Codes
Codes E07, E09, E10, E20, E21, E2030, E2120, E2130, E6001, and E6002 belong to the heating, heat-pump, or drying side of the dishwasher.
E09, E20, E2030, and E6001 are associated with an internal heat-pump heater fault. E21 and E6002 indicate that the heat pump is blocked. E07 and E2130 relate to the Zeolite or CrystalDry fan motor, while E10 and E2120 concern the CrystalDry chamber heater.
A dishwasher with one of these alerts may leave dishes cold, wet, greasy, or poorly dried. It may also interrupt the cycle when the expected water temperature is not reached. These systems are model-dependent and are not suitable for guess-based parts replacement.
Water Intake and Flow-Monitoring Codes
E14 and E3000 indicate a flow-meter failure or another problem in the filling system. E16, E17, E3300, and E3400 point to water entering incorrectly or not entering at all. E18 and E3200 are generally connected with low water flow, an insufficient water level, or improper pumping during fill.
Before requesting repair, confirm that the water supply valve is open and that the inlet hose is not kinked, crushed, or visibly damaged. If water enters slowly, the dishwasher may pause, run longer than normal, or stop near the beginning of the program.
A recurring code can indicate an inlet valve, flow sensor, wiring, or control issue that requires model-specific testing.
Leak-Protection Codes
E15 and E3100 mean the safety system has detected water in the base of the dishwasher and activated leakage protection. Turn off the water supply and avoid repeatedly restarting the machine.
Water in the base can come from a hose, seal, pump connection, internal overflow, or another leak that must be located before normal use resumes. Continuing to run the dishwasher may allow additional water to enter the base or surrounding cabinet area.
Detergent Dispenser, Drain Pump, and Power Codes
Detergent Dispenser Codes
E19 and E6900 relate to the detergent-dispenser solenoid circuit. The detergent door may fail to open at the correct time, leaving detergent in the dispenser and dishes insufficiently cleaned.
Drain Pump Codes
E23 and E6101 indicate a drain-pump problem, including a blocked, clogged, or faulty pump. Homeowners may notice standing water, humming, an interrupted cycle, or water that drains very slowly.
Removing visible debris from the accessible filter area may help, but sharp fragments can collect near the pump. Internal pump testing or removal should be left to a qualified appliance technician.
Power Supply Codes
E27 and E9001 indicate that the incoming household voltage is too low. If the code returns after power is reset, the electrical supply should be checked by a qualified electrician rather than by replacing dishwasher components.
What San Diego Homeowners Should Check First
Write down the full code, stop the cycle, and observe whether the dishwasher is filling, heating, draining, leaking, or recognizing the door.
Check only accessible items such as the water valve, inlet hose, filter area, and door closure. A brief power reset may clear a temporary electronic interruption, but it should not be repeated when water is present or the same code immediately returns.
Bosch Dishwasher Error Code Help in San Diego
Persistent Bosch dishwasher codes usually require model-specific testing. Reset Appliance Repair provides Bosch dishwasher repair in San Diego, including diagnosis of water-flow problems, heating failures, drain-pump faults, leak protection, door-sensor issues, and electronic control errors.
A technician can identify the affected system, test related wiring and components, and explain the appropriate repair step before unnecessary parts are replaced.
Related Bosch Appliance Error Code Guides
Use these Bosch resources to move from dishwasher-specific fault information to the broader brand library and other appliance guides.
Bosch Appliance Error Codes: Start with the main Bosch appliance error code guide to explore diagnostic information for Bosch kitchen, laundry, and refrigeration appliances.
Dryer: Review Bosch dryer error codes when another Bosch appliance in the home displays an electronic or heating-related warning.
Refrigeration: Explore Bosch refrigeration error codes for additional guidance covering fault messages found across Bosch refrigerators and related refrigeration systems.
These connected resources give homeowners access to the wider Bosch support section while keeping each appliance’s diagnostic information clearly separated.
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Bosch Dishwasher Error Code Meanings and Troubleshooting Steps
This reference table connects Bosch dishwasher error codes with control-board, heating, water-intake, leak-protection, drainage, dispenser, door-sensor, and power-supply faults. Review each code’s meaning and the recommended action to determine which accessible checks are appropriate and when the appliance requires professional diagnosis.
| Error Code | Meaning | Safe first steps | Technician required | Related help |
|---|---|---|---|---|
| E01 | Heat pump motor circuit fault at the main control board. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E02 | Main control board relay fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E03 | Main control board relay fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E04 | Faulty (heater) electronics detected in the self-test. | No user repair is listed by Bosch; stop and arrange service. | Yes — if the code returns | |
| E05 | Wash arm diverter circuit fault in the main control board. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E06 | Door sensor circuit fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E07 | Zeolite (Crystal Dry) fan motor defective. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E09 | Heat pump internal heater fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E10 | Zeolite (Crystal Dry) chamber heater fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E14 | Flow meter failure or a filling-system / water-entry issue. | No DIY repair is listed by Bosch; arrange service. | Yes — if the code returns | |
| E15 | Water in the dishwasher base; leakage protection has been activated. | Turn off the water inflow immediately. | Yes — if the code returns | |
| E16 / E17 | Issue with water flowing into the dishwasher or the filling system. | Check the inlet hose for kinks or damage. | Yes — if the code returns | |
| E18 | Water-flow issue; water level too low or water is not being pumped correctly. | Check the inlet hose and confirm the water supply is on (Bosch notes 10 l/min flow). | Yes — if the code returns | |
| E19 | Detergent dispenser solenoid circuit fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E20 | Heat pump internal heater fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E21 | Heat pump is blocked. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E23 | Drain pump issue (blocked, clogged, or faulty). | Bosch routes this code straight to support on the error-code page. | Yes — if the code returns | |
| E27 | House power supply to the unit is too low. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E0100 | Heat pump motor circuit fault at the main control board. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E0103 | Main control board relay fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E0105 | Faulty (heater) electronics detected in the self-test. | No user repair is listed by Bosch; arrange service. | Yes — if the code returns | |
| E0106 | Wash arm diverter circuit fault in the main control board. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E0107 | Main control board relay fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E0110 | Electronics miscommunication failure. | No DIY repair is listed by Bosch; arrange service. | Yes — if the code returns | |
| E2030 | Heat pump internal heater fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E2120 | Zeolite (Crystal Dry) chamber heater fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E2130 | Zeolite (Crystal Dry) fan motor defective. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E3000 | Flow meter failure or a filling-system / water-entry issue. | No DIY repair is listed by Bosch; arrange service. | Yes — if the code returns | |
| E3100 | Water in the dishwasher base; leakage protection has been activated. | Turn off the water inflow immediately. | Yes — if the code returns | |
| E3200 | Water-flow issue; water level too low or water is not being pumped correctly. | Check the inlet hose and confirm the water supply is on (Bosch notes 10 l/min flow). | Yes — if the code returns | |
| E3300 / E3400 | Issue with water flowing into the dishwasher or the filling system. | Check the inlet hose for kinks or damage. | Yes — if the code returns | |
| E6001 | Heat pump internal heater fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E6002 | Heat pump is blocked. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E6101 | Drain pump issue (blocked, clogged, or faulty). | Bosch routes this code straight to support on the error-code page. | Yes — if the code returns | |
| E6900 | Detergent dispenser solenoid circuit fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E8000 | Door sensor circuit fault/error. | Reset power at the breaker for 30 seconds. | Yes — if the code returns | |
| E9001 | House power supply to the unit is too low. | Reset power at the breaker for 30 seconds. | Yes — if the code returns |
