What ERR 030 Means
ERR 030 indicates the cooktop is receiving a supply voltage outside the range it's designed to safely operate within — a home electrical supply issue rather than a problem with the cooktop itself.
Common Causes of ERR 030
- Incorrect breaker or circuit wiring for the appliance's voltage requirement
- Loose electrical connection at the junction box
- Home electrical supply irregularity
🔧 One Safe Check You Can Try
No DIY check applies in this case — a licensed electrician needs to address the home electrical supply issue this points to, and a cooktop repair alone won't fix it.
⚠ Why You Shouldn't Go Further Than That
- This points to a home electrical supply issue, which needs a licensed electrician to diagnose and correct, not a cooktop repair alone.
- Continuing to use the cooktop with incorrect supply voltage risks further damage to its electronics beyond the original problem.
- Confirming the cooktop wasn't damaged by the voltage irregularity requires a technician's inspection once the electrical issue is fixed.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.
Technical Reference
- Code
- ERR 030
- Appliance
- Miele cooktop
- Maker documentation
- Miele owner manuals and use & care guides
- Checked
- September 2026
Code meanings can change between control generations. Before acting on a code, match the full model number on your appliance's rating label against the manual for that model. We are an independent repair service, not affiliated with Miele & Cie. KG.