Error Code: E02 Difficulty: Hard
Problem: Main control board relay fault.
How to Fix E02 Error (Step-by-Step)
- Turn off the power to the dishwasher at the circuit breaker.
- Access the bottom of the dishwasher by removing the lower access panel.
- The temperature sensor (thermistor) is located on the sump assembly. Disconnect the wires from the sensor.
- Rotate the sensor to release it and pull it out. Install the new sensor and reconnect the wires.
- If replacing the control board, remove the outer door panel by taking out the screws around the inner door.
- Disconnect the wire harnesses from the control board, remove the board, and install the new one, ensuring all connections are secure.
- Reassemble the dishwasher, restore power, and check if the error is cleared.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Next Steps and Parts
- Temperature Sensor (Thermistor)
Recommended Parts to Check
No exact official OEM part number is listed here because the correct Bosch dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims.
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Bosch dishwasher water inlet valveCommon replacement category: Water inlet valveFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. -
Bosch dishwasher drain pumpCommon replacement category: Drain pumpFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. -
Bosch dishwasher circulation pumpCommon replacement category: Circulation pump / wash motorFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked.
Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag.
What to Check Next on This Bosch Dishwasher
Bosch Dishwasher Error E02: Use the code, light, or symbol as the starting clue, then confirm what the dishwasher actually does before ordering parts.
- 1. Turn power off before opening panels, reaching into the sump, touching wiring, or checking the pump, heater, valve, sensor, latch, or control area.
- 2. Confirm whether the display is a normal cycle/status symbol or a recurring fault that interrupts filling, washing, draining, drying, locking, or control response.
- 3. Start with the heat and temperature path: water circulation, heater circuit, NTC sensor, wiring, and control output.
- 4. Clean the filter and sump, check spray-arm movement, verify water supply, inspect the drain hose and sink connection, and correct any visible blockage before replacing parts.
- 5. Run a short test cycle and watch where it fails; the exact stage matters more than the displayed word or symbol by itself.
- 6. Replace a part only after the same symptom repeats and the model-specific checks point to that part category. Match any replacement to the complete Bosch model number on the door tag.
If the issue returns after these checks, match replacement parts to the complete Bosch dishwasher model number from the door tag. The same display clue can point to different components depending on the exact model and when the failure appears.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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