Error code
Bosch Washing Machine Error Code E27
Power supply or voltage issue The most likely cause is temporary voltage fluctuation. Check first: check the plug is seated properly and the socket appears normal.
Quick answer
E27: what does it mean and how to fix
What does it mean?
Power supply or voltage issue
How to fix first
Turn the machine off and unplug it from the mains.
Why is this happening?
Temporary voltage fluctuation
When should I call an engineer?
If the fault comes back and the power supply appears stable, the appliance may need electrical diagnosis.
What does this error code mean?
Bosch washing machine error code E27 usually points to unstable incoming power or the control system detecting an electrical supply problem.
In practice, E27 is commonly linked to Temporary voltage fluctuation, Loose power connection, or Internal control issue affecting power monitoring.
Start with this safe check: Turn the machine off and unplug it from the mains. If the code returns, the fault worsens, or the appliance does not behave normally, if the fault comes back and the power supply appears stable, the appliance may need electrical diagnosis.
Why is this happening?
- Temporary voltage fluctuation
- Loose power connection
- Internal control issue affecting power monitoring
How to fix this safely
- Turn the machine off and unplug it from the mains.
- Check the plug is seated properly and the socket appears normal.
- Wait a few minutes before restoring power and retrying once.
Reset steps
- Reconnect power after a short pause.
- Run a brief test cycle and stop if the code returns.
When to call an engineer
If the fault comes back and the power supply appears stable, the appliance may need electrical diagnosis.
Safety warning
Disconnect the appliance from the mains before checking the plug or cable and stop if there are signs of overheating or burning.
Useful hub links
Related power and control fault codes
Bosch Washing Machine E29 Error - Not Filling Properly and How to Fix It
The washer is not filling with water properly.
Bosch Washing Machine Error Code E28
Control or wiring communication fault
Bosch Washing Machine Error Code E25
The machine is not draining water correctly
Bosch Washing Machine Error Code E26
Water level or pressure sensing fault
After resolving this fault, use the right wash setting to help prevent repeat issues.
Relevant guide
Frequently asked questions
Can I keep using a Bosch washing machine with E27 showing?+
It is usually better to pause use until you have completed the safe first checks for E27, then test the machine with a short programme.
Will resetting clear E27 for good?+
A reset may clear a temporary interruption, but if E27 comes back after the first safe checks, the underlying fault still needs attention.