Error code
Bosch error code E27
Bosch error code E27: the voltage reaching the machine is too low for it to run. 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 E27, from the manufacturer's own pages
A code is only meaningful together with the generation showing it — the same two digits mean different things across generations.
The code
E27
The voltage reaching the machine is too low for it to run
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What it narrows down to
Low supply voltage
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
In more detail
About Bosch error code E27
What this one means
The voltage reaching the machine is too low for it to run. It is a code the manufacturer publishes for this appliance, not one we have worked out — and it is decoded here rather than left as three characters on a display.
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:
- E27, E9001 — the same condition, on machines of different ages
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 circuit feeding the machine
- The building's supply
Worth doing before you call
- Cut power at the breaker for thirty seconds and try again
- Note whether other appliances on the same circuit misbehave at the same time of day
Then what
This one is about the building rather than the dishwasher, and no part inside the machine will improve it. If it repeats, it is an electrician rather than an appliance technician.
This code is published for dishwashers. The full list of codes has the rest of them, searchable, including the labels older and newer machines use for the same conditions.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards