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e27
Moderate
Bosch · Dishwashers
Power supply undervoltage
Quick Answer
Error code E27 on your Bosch Dishwashers means: Power supply undervoltage. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
SHXM4AY55NSHEM3AY55NSHP95CM5NSHPM65Z55NSGX78B55UCSHXM88Z75NSHXM78Z55NSHX78CM5NSHP878ZD5NSHPM88Z75NSHPM78Z55NSHEM78Z55NSHX89PW75NSHV89PW73NSHE89PW75N
Likely Causes
  1. Household voltage supply is too low
  2. Faulty electrical outlet or wiring
  3. Circuit breaker issues or loose connections
  4. Power surge or fluctuation damage
How to Fix It
1
Turn off the dishwasher and reset the circuit breaker for 30 seconds.
2
Restore power and restart the dishwasher.
3
If the error recurs, use a voltage meter to check the voltage at the outlet (should be 120V +/- 10%).
4
Try plugging the dishwasher into a different circuit if possible.
5
Contact a licensed electrician to check the incoming voltage and wiring to the appliance.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes
E0E01E02E03E04
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