Acorn Superglide 120 / Brooks (T498) fault code 3: Overspeed governor (OSG) tripped

Code3 CONFIRMED
MeaningOverspeed governor (OSG) tripped
Control boardSuperglide 120 / Brooks straight – T498 single-digit display CONFIRMED
How it showsSingle digit or letter on the seat display

Likely causes

Safety governor operated

Step-by-step checks

  1. Hand wind clockwise (max ~10 turns) until display shows 1
  2. Then call Brooks

Stairlift faults that stay after these checks are a job for a trained engineer.

Models using this control board

Other Acorn Superglide 120 / Brooks (T498) codes

Blank · 3 · 4 · 7 · 8 · 9 · A · 0 · 2 · 5 · 6 · C · E · F · U

All Acorn Superglide 120 / Brooks (T498) codes ›

Source: web.archive.org/web/2020/http://www.brooksstairlifts.com/support/digit ↗

Summarised from public manuals. Always check the product's own manual before any repair.