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Forerunner 955 altimeter/ barometer faulty

Hi,

For about a month now my Forerunner 955 gives me ridiculous altitude readings ranging from -45.000 to +30.000 and everything in between. I've clocked runs with 35.000+ elevation, great performance, but sadly untrue. Latest updates are installed, I have read and tried about soaking in warm water to clear the port but nothing makes a difference. Even when the barometer reads normal around 1000 mBar, I'm still 27.000m below sea level? Any ideas?

Also, does this effect my VO2max calculation? As the running power is of the scale on some runs due the watch thinking I'm running up Mt Everest every 7 minutes.

I'm assuming the VO2 just uses heart rate/pace though?

Thanks,

Fred

0 trux over 1 year ago

If you already tried all the troubleshooting, including the manual calibration, without success, then I recommend reaching out to the Product Support. You could also try reinstalling the firmware, just in case the Sensor Hub part of the firmware is damaged. You can find the instructions in the thread https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-7-series/362033/fenix-7-heart-rate-not-detected/1738873#1738873, though not all models have the option "Reinstall Software" in the Developer menu.

Otherwise, to avoid that the excessive elevation changes impact your VO₂max and other metrics, you can set the altimeter into the mode "Barometer Only". In Garmin Connect Web, you can then enable the Elevation Corrections at given activity, in order to see its elevation profile.