Bosch Dishwasher E27 Error: Low Voltage Detected
What Does Bosch Dishwasher Error Code E27 Mean? Error code E27 on a Bosch dishwasher indicates that the control board has detected a low voltage condition. The dishwasher requires a stable electrical supply to operate its motors, heating elements, and control circuits reliably. Common Causes The most common cause is a shared electrical circuit with […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. If caused by a temporary voltage drop from other appliances, the dishwasher is safe once those are turned off. Persistent low voltage suggests an electrical issue that should be evaluated.
Can I reset the code?
Yes. E27 typically clears automatically when stable voltage is restored. A power cycle can also reset the error.
When to stop immediately?
Stop if you notice: The breaker trips repeatedly, You smell burning from the electrical connection.
Symptoms You May Notice
Dishwasher shuts off mid-cycle
The unit powers down unexpectedly during a wash program, especially when the heater or motor kicks in.
Dishwasher fails to start
The display lights up but the machine will not initiate a wash cycle.
Display dims or flickers
The control panel display appears dim or flickers, indicating unstable power supply.
Possible Causes
Voltage drop in home circuit
Other high-draw appliances on the same circuit are causing voltage to dip below acceptable levels.
DIY PossibleLoose electrical connection
The power cord connection at the junction box under the dishwasher is loose or corroded.
Requires ProfessionalUndersized circuit or wiring
The electrical circuit supplying the dishwasher does not provide adequate amperage.
Requires ProfessionalSafe Checks You Can Do
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1
Check for other appliances on the circuit
Determine if other high-draw appliances (microwave, toaster, space heater) are sharing the same electrical circuit with the dishwasher.
Turn off other appliances on the same circuit before running the dishwasher.
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2
Test a different outlet
If the dishwasher is plugged in (not hardwired), try using a different outlet on a separate circuit.
Bosch dishwashers should be on a dedicated 15A or 20A circuit for reliable operation.
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3
Check the circuit breaker
Inspect the breaker panel for the dishwasher circuit. The breaker should be firmly in the ON position — not tripped or in a middle position.
A breaker that trips repeatedly may indicate a wiring issue.
When to Call a Professional
Contact a qualified technician if:
- E27 appears even with no other appliances running
- Circuit breaker trips when the dishwasher runs
- Electrical connections show signs of heat damage
Need Professional Help?
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