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e30
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Bosch · Dishwashers
Voltage too high (overvoltage)
Quick Answer
Error code E30 on your Bosch Dishwashers means: Voltage too high (overvoltage). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
SHXM4AY55NSHEM3AY55NSHP95CM5NSHPM65Z55NSGX78B55UCSHXM88Z75NSHXM78Z55NSHX78CM5NSHP878ZD5NSHPM88Z75NSHPM78Z55NSHEM78Z55NSHX89PW75NSHV89PW73NSHE89PW75N
Likely Causes
  1. Incoming voltage exceeds 240V or is above rated specification
  2. Faulty voltage regulator in the home
  3. Electrical wiring issue
  4. Power surge from the utility
How to Fix It
1
Turn off the dishwasher immediately and unplug it.
2
Use a multimeter to check the voltage at the outlet (should be 120V for US models, not exceeding 132V).
3
Do not operate the dishwasher if overvoltage is confirmed.
4
Contact a licensed electrician to diagnose and resolve the voltage issue.
5
Have the dishwasher inspected for damage before using again.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Related Error Codes
E0E01E02E03E04
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