Error code
Bosch Dishwasher Error Code E02 - Meaning, Causes & Fix
Bosch dishwasher E02 usually points to an electronic control or relay fault. Try one safe power reset only, then stop if the code returns or there is any leak, smell, or electrical concern.
Quick answer
E02: The dishwasher has detected an electronic control or relay fault.
Code
E02
Bosch Dishwasher
First safe check
Switch the dishwasher off and isolate it from power before doing any checks.
When to call an engineer
Call a dishwasher engineer if E02 returns after one safe reset, the dishwasher does not heat, the display behaves oddly, the appliance trips power, water appears underneath, or diagnosis would require opening the cabinet.
High severity: escalate quickly if it persists. Disconnect power before checking accessible parts where the appliance guidance says to do so.
Fix time
5-10 minutes for safe checks
Difficulty
Engineer diagnosis if persistent
The safe checks are limited to power isolation, visible warning signs, and one cautious restart.
Expected outcome: A temporary control interruption may clear once; repeat E02 usually means the electronic fault still needs diagnosis.
What does this error code mean?
Bosch dishwasher error code E02 usually points to an electronic control fault, often described as a relay or main-control issue. It is not normally caused by loading, detergent, or a dirty filter.
The safe user action is limited to isolating power briefly and checking for obvious warning signs around the appliance. If E02 returns after one reset, avoid further use because diagnosis may involve internal electrical parts.
If the dishwasher is also not heating, compare Bosch dishwasher E09. If there are wider power symptoms, compare Bosch dishwasher E27 or Bosch dishwasher E01.
Symptoms users may notice
- The dishwasher may stop early or refuse to start.
- E02 may return soon after power is restored.
- The display or controls may behave unpredictably.
- The dishwasher may also show heating or power-control symptoms.
What users often notice
- E02 often feels like a sudden electronics fault rather than a blockage or cleaning issue.
- A simple reset may clear the display briefly, but repeated E02 should not be ignored.
Why is this happening?
- Main control board relay fault or electronic control issue
- Internal power-module fault
- Wiring or connector issue inside the appliance
- Heating-control fault reported through the electronics
What this usually points to
E02 usually relates to the dishwasher electronic-control path, including the main control board, relay operation, internal wiring, and heating-control signals.
How to fix this safely
- Switch the dishwasher off and isolate it from power before doing any checks.
- Check only for obvious external warning signs such as water underneath, a burning smell, repeated tripping, or a flickering display.
- Restore power after a few minutes and try one short programme only if the appliance is dry and behaves normally.
- Stop if E02 returns, the dishwasher fails to heat, the display behaves unpredictably, or there is any electrical concern.
- Arrange engineer diagnosis rather than removing panels or accessing the control board.
Can I fix this myself?
NoE02 is mainly an internal electronic-control fault. A user reset is reasonable once, but repeated E02 needs professional diagnosis.
Safety boundary: Do not remove panels, access the control board, test wiring, bypass relays, or run the dishwasher if water may be reaching electrical parts.
What not to do
- Do not keep repeating resets if E02 comes back.
- Do not remove panels, access the control board, or test wiring.
- Do not use the dishwasher if it smells hot, trips the electrics, leaks, or behaves unpredictably.
Common misdiagnoses
- E02 can be mistaken for a filter or loading issue, but it usually points to the control electronics.
- If dishes are cold or wet as well, the control fault may overlap with a heating-code pattern such as E09.
Reset steps
- Turn the dishwasher off and isolate power for a few minutes.
- Reconnect power only if the appliance and surrounding area are dry and there is no smell, leak, or electrical concern.
- Run one short test programme.
- Stop using the appliance if E02 returns or any heating, display, smell, leak, or tripping symptom appears.
Intermittent vs persistent faults
A one-off E02 after a power interruption may clear, but repeated E02 should be treated as a persistent electrical-control fault.
When to call an engineer
Call a dishwasher engineer if E02 returns after one safe reset, the dishwasher does not heat, the display behaves oddly, the appliance trips power, water appears underneath, or diagnosis would require opening the cabinet.
Safety warning
Disconnect the dishwasher from power before checking anything accessible. Do not remove panels or work on internal control, wiring, pump, heater, valve, or relay parts yourself.
Useful hub links
Related power and control fault codes
Bosch Dishwasher E09 Error - Heating Fault Warning
The dishwasher is not heating water properly.
Bosch Dishwasher Error Code E27
the dishwasher has detected low mains voltage.
Bosch Dishwasher Error Code E01
the dishwasher has detected an electronic control fault.
Bosch Dishwasher Error Code E19
a dishwasher valve or heat-exchanger related component may not be operating correctly.
Relevant guide
Frequently asked questions
What does Bosch dishwasher E02 mean?+
Bosch dishwasher E02 usually means the dishwasher has detected an electronic control or relay fault.
Can I fix Bosch dishwasher E02 myself?+
Only one safe power reset and visible external checks are sensible. If E02 returns, the likely fault area is internal and should be diagnosed by an engineer.
Can I keep using a Bosch dishwasher with E02?+
No. Avoid normal use if E02 returns, the dishwasher fails to heat, the display behaves oddly, or there is any leak, smell, or electrical concern.
Model variation note
Bosch dishwasher code wording can vary by model. Use the exact model manual where available, and keep checks to safe user-accessible observations.