- Appliances
- Dishwashers
E27
Bosch dishwasher E27: low supply voltage
Evidence linked to this decision
View source: Bosch US dishwasher error codesRisk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
E27 means the household supply voltage reaching the dishwasher was too low. Disconnect it once and request service if the code returns; do not open electrical covers.
Safety first
Stop and check this first
- Leave the dishwasher disconnected for heat, arcing, burning odour, repeated breaker trips or a damaged plug. Never probe an energised board.
Safe checks you can perform
- Perform one controlled power reset
- Inspect only the external supply
- Record the full code and E-number
Leave these tasks to a qualified professional
- Do not attempt this professional task: Separate supply and control faults
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Separate supply and control faults
What they doA qualified technician should test the incoming supply, protected input, harnesses and the code-specific control circuit.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Perform one controlled power reset
Switch off, isolate the dishwasher at its normal dry supply for 30 seconds and restore power only once.
Leave the dishwasher disconnected for heat, arcing, burning odour, repeated breaker trips or a damaged plug. Never probe an energised board.
Evidence: Bosch US dishwasher error codes
Inspect only the external supply
Remove extension leads and look for heat, damage or a tripped protection without opening the plug, outlet or appliance.
Leave the dishwasher disconnected for heat, arcing, burning odour, repeated breaker trips or a damaged plug. Never probe an energised board.
Evidence: Bosch US dishwasher error codes
Record the full code and E-number
Photograph the display and rating-plate E-number so service can select the correct circuit information.
Leave the dishwasher disconnected for heat, arcing, burning odour, repeated breaker trips or a damaged plug. Never probe an energised board.
Evidence: Bosch US dishwasher error codes
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Virtual technician
Does E27 still appear after these checks?
This guided flow uses the exact code and your answers to choose a test, an expected result and the next branch.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Bosch
- Product type
- Dishwashers
Known code variants
- Balay dishwasher E27
- Balay E27
- Bosch dishwasher E27
- Bosch E27
- Bosch E27 error
- Bosch Geschirrspüler Fehler E27
- code erreur E27 lave-vaisselle Siemens
- codice E27 Bosch
- codice E27 Siemens
- código E27 Siemens
- E27
- E27 Bosch dishwasher
- E27 lavavajillas Balay
- E27 lavavajillas Bosch
- E27 Siemens dishwasher
- E:27
- erreur E27 Siemens
- Error E27 Balay
- error E27 Bosch
- error E27 lavavajillas Siemens
- errore E27 lavastoviglie Bosch
- errore E27 lavastoviglie Siemens
- F27
- F:27
- Fehlercode E27 Bosch
- Fehlercode E27 Siemens
- lavavajillas Bosch E27
- Siemens dishwasher E27
- Siemens E27
- Siemens Geschirrspüler Fehler E27
What it means
Bosch's official United States dishwasher table associates E27 with low incoming household power. This page is restricted to Bosch dishwashers: the same code on a washer, dryer or another appliance can mean something else, and the exact E-number and manual decide compatibility.
Warnings and stop conditions
- Highsource verified
Leave the dishwasher disconnected for heat, arcing, burning odour, repeated breaker trips or a damaged plug. Never probe an energised board.
Evidence: Bosch US dishwasher error codes
Symptoms and causes
Probable causes · in order
- External supply or a transient interrupted controlConfirmed
A brief outage, unstable outlet or interrupted startup can leave the electronic self-test incomplete.
Evidence: Bosch US dishwasher error codes
- A board, relay, harness or protected input is faultyPossible
Internal power distribution and control feedback can produce the same display and require model-specific measurements.
Evidence: Bosch US dishwasher error codes
Sources and technical references
- 1
Bosch US dishwasher error codes
BSH Hausgeräte GmbH · 2026 · official_doc
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