AVENTON SINCH STEP-THROUGH Error Code 21
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
91%
CONF
|
Brushless DC Motor Controller
Error 21 indicates a current abnormality detected by the logic board. This failure mode typically originates from a blown MOSFET on the controller circuit board that can no longer regulate the amperage flowing to the motor, triggering an immediate safety shutdown to protect the battery cells.
|
|
|
6%
CONF
|
Motor Quick-Connect Wiring Harness
Mechanical abrasion or thermal stress on the phase wire insulation can cause intermittent shorting between the three main power leads. When these wires contact each other, the resistance drops toward zero, causing a current spike that the system identifies as Error 21.
|
|
|
3%
CONF
|
500W Geared Hub Motor Assembly
Internal degradation of the motor's copper windings or a failure of the internal hall sensors can lead to an improper load profile. If the windings are shorted due to excessive heat, the controller will sense an over-current state and throw the error code to prevent a thermal runaway event.
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DIY Repair Guide
Watch exactly how to replace the Brushless DC Motor Controller.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.