What dr:21 Means
dr:21 on a Bosch Vision front-load washer records a sustained overvoltage on the supply rather than a brief spike. Bosch's cause is a weak power supply, and the remedy is to wait and then check line voltage. A supply that sits high for a prolonged period usually indicates a wiring problem at the property rather than a momentary event.
Common Causes of dr:21
- Sustained high supply voltage at the property
- Neutral connection problem causing an elevated supply
- Supply irregularity upstream of the house
🔧 One Safe Check You Can Try
Note whether other electronics in the house have been failing early or whether lights brighten and dim together, since those accompany the kind of supply problem this code records. Measuring it is an electrician's job.
⚠ Why You Shouldn't Go Further Than That
- Sustained overvoltage damages electronics throughout a house, so treating it as a washer fault misses the larger issue.
- Diagnosis happens at the distribution board with the load connected, not at the appliance.
- Neutral faults are a recognised hazard and are licensed electrical work in most jurisdictions.
- Running the machine through a sustained overvoltage is what eventually destroys the drive that has so far protected itself.
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.