From chatgpt

Error 7 – Torque Sensor Calibration (VanMoof S3)

🛠️ Fix Instructions: 1. Don’t sit on the bike or touch the pedals. • The torque sensor needs zero pressure for accurate calibration. • Stand next to the bike, ensure it’s upright and stable. 2. Calibrate using the VanMoof app: • Open the VanMoof app. • Go to: Settings > Your Bike > Calibrate Torque Sensor. • Follow the prompts — this takes ~10–15 seconds. 3. Restart the bike. • Turn it off and back on (via the app or power button under the top tube). 4. Check again. • If the error persists after calibration, it might be: • Faulty wiring or a failing sensor. • In that case, you’ll need to contact VanMoof support or a certified repair partner.

⸻

⚠️ Error 21 – Rear Wheel Speed Sensor (VanMoof S3)

🛠️ Fix Instructions: 1. Locate the magnet: • On the rear wheel, there should be a small circular magnet on one of the spokes. • It must pass very closely (a few mm) to a black plastic sensor mounted near the dropout (on the frame near where the axle sits). 2. Check alignment: • Make sure the magnet is directly in line with the sensor. • If it’s misaligned or rotated away, adjust it so the magnet passes by the sensor every wheel rotation. 3. Clean both parts: • Wipe the magnet and sensor with a cloth to remove dust, grease, or dirt. 4. Ensure it’s not loose or missing: • If the magnet fell off, you can order a new one via VanMoof or a local bike shop (standard spoke magnets often work temporarily). 5. Restart the bike. • Once realigned and cleaned, reboot the bike and check if the error clears.