Error code
Bosch dishwasher error code E02
Bosch error code E02: a relay on the main control board is not switching as it should. What the code covers, what to check first, and what it does not tell you — on dishwashers.
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What we can confirm
Code E02, from the manufacturer's own documentation
A code is only meaningful together with the machine showing it — the same digits mean different things on different equipment.
The code
E02
A relay on the main control board is not switching as it should
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What it narrows down to
Board relay
What you are probably seeing
Diagnostic
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What it looks like from the kitchen
The symptom this code usually arrives with
A code names the subsystem; the symptom is what sent you to look at the display in the first place. That page says what it usually turns out to be, cheapest cause first.
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Often the door, not the machine Dishwasher will not start
A machine that does nothing, starts and stops, or lights up and never fills. Door and power account for most of these, and both are worth checking before anything is booked.
- No lights at all
- Lights on but nothing happens
- Starts, then stops within a minute
On the same appliance
What else belongs to the dishwashers
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
Heat pump circuit
Heating self-test
Wash arm diverter
Door sensor
Drying fan
Heat pump heater
Mineral chamber heater
Scale build-up
Flow meter
Leak protection
Water not entering
Low water level
The same digits mean different things on different equipment. Search the full code list
In more detail
About Bosch dishwasher error code E02
What this one means
A relay on the main control board is not switching as it should.
The other ways your machine may say it
The same condition is published under more than one label, because it has been carried across generations of this appliance:
- E02, E03, E0103, E0107 — the same condition, on machines of different ages
- Sanitized light flashing — how a model with no digital display says it. On that machine, the lights are the code
What the code covers
A published cause names a circuit rather than a component, which is the single most useful thing to know before ordering a part. This one covers:
- The relay itself
- Whatever it was trying to switch
- The board's own supply
Worth doing before you call
- Cut power at the breaker for thirty seconds
- Note whether the machine gets further into the cycle on the second attempt
Then what
A relay code that clears once and returns a week later is a board on its way out, and it is worth diagnosing before it strands a full load.
This code is published for dishwashers. The full list of codes has the rest.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards