RideFixer app
RideFixer Android App Scan errors, compare sounds and diagnose e-bike issues on your phone.
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Brose Error Code

504 - Temperature Derating

Motor is hot; controller reduced output to protect system.

Medium severity Caution rideability Info urgency

What it means

Thermal safeguard mode activated.

Common causes

  • Long climb under load
  • High ambient heat
  • Heavy cargo

Symptoms

  • Reduced acceleration
  • Limited assist

How to fix it

  • Cool bike
  • Reduce assist level
  • Inspect airflow and load
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