Issue with Garmin Fenix 6 Asia Sapphire (Suddenly Malfunctioning Since May 23, 2025)
Several features have stopped working:
- Compass: Always points west (deviation 000).
- Pulse Oximeter: Shows "Version mismatch, update software."
- Heart Rate Sensor: Displays "---" even though the green light is on.
What I’ve tried:
- Soft reset
- Hard reset
- Factory reset
- Software update (via Garmin Connect & Garmin Express)
- Attempted manual firmware downgrade/upgrade using Fenix 6 Pro firmware (unsuccessful, likely due to differences between Fenix 6 Asia Sapphire and Fenix 6 Pro).
Current Watch Status:
- Software Version: 27.00
- GPS: 6.60
- Wi-Fi: 4.01
- CIQ: 3.4.5
- BMX: 0.0.0 (!)
- WHR: 0.00.00
- ANT/BLE/BT: 6.15
- Sensor Hub: 0.00
Strange Behavior:
When I connect the watch to Garmin Express, it shows 1 update available: "Install Sensor Update (Change Log)." After installing, the watch restarts, and briefly, the compass, heart rate, and Pulse Ox work normally—but after a few seconds, they stop again.
When I reconnect to Garmin Express, the same sensor update reappears (I’ve repeated this process multiple times with no success).
"It seems like the watch is deleting the update on its own."
Question:
Does anyone know a solution to this problem?
Thank you!