Bosch dishwasher E02 points to main control-board relay fault. Start with the safe checks that apply to this system and stop if the warning returns.
Model compatibility: Bosch reuses codes across series and model years, so E02 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
The verified Bosch meaning for E02 is main control-board relay fault. Treat that wording as the technical anchor for this page. The displayed code narrows the system that needs attention, but the complete E-Nr and observed behavior are still important before a repair decision is made.
Signs
Symptoms you may notice
the dishwasher may stop before a cycle finishes
controls may respond inconsistently
the code may return shortly after power is restored
normal wash functions may be unavailable
Why it happens
Possible causes
main control-board circuit fault
relay or switching fault within the control path
wiring or connected-load condition that the board detects
Important safety warning. Leave the appliance off if there is a burning smell, smoke, sparking, or a breaker that trips again.
Seeing this code on your Bosch appliance?
Book a specialist visit for a clear estimate and approval before any repair.
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Request an appointment with your appliance model and symptom. We confirm a visit window, diagnose on site, then give a clear estimate. Approved work only proceeds after you agree.
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Yes. We diagnose and repair Bosch refrigerators, dishwashers, washers, dryers, ovens, cooktops, and coffee machines common in LA and Orange County homes.
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