What dr:20 Means
dr:20 on a Bosch Vision front-load washer is a short circuit across the inverter's power stage, which Bosch attributes to an IGBT short and high current. The remedy given is to replace the inverter. Where the individual-device code describes one switching element failing, this one describes the output stage as a whole going down, usually with a decisive symptom such as the machine tripping its breaker.
Common Causes of dr:20
- Inverter power stage shorted
- Excessive current drawn through the drive
- Motor fault that took the output stage with it
🔧 One Safe Check You Can Try
Leave the breaker off. If the washer trips the circuit when it is switched on, that is a clear sign to stop and call rather than to reset the breaker repeatedly.
⚠ Why You Shouldn't Go Further Than That
- Repeatedly resetting a breaker on a short circuit is how a fault that was contained becomes one that is not.
- Inverter capacitors hold charge after the supply is removed, so the module is not safe to handle immediately.
- Bosch's remedy is replacement of the module, which means there is no component-level repair to attempt.
- Fitting a new inverter without checking the motor risks destroying it the same way.
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.