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Altimeter stuck at 20.000m after starting a workout

Former Member
Former Member over 6 years ago
Hi guys,

I have been using my Forerunner 935 for 15 months and last week it started doing something funny. Every time I start a workout the altimeter goes to 20.000m and gets there forever. If I try recalibrating, it gets back to the "normal" altitude"...but when I start the workout again, it gets back to 20.000. I'm on AUTO (altimeter/barometer) mode....any clue about what's going on?

thanks
Samir
  • 0 over 6 years ago
    I'd contact customer support. This sounds like a hardware problem to me. When you say it gets back to a normal altitude, does it adjust appropriately after that or does it just stay on what you calibrated to? You could also look at what the barometer is doing. Add it as a widget if you haven't already and see if it looks reasonable.

    I doubt it is the problem, but make sure the pressure holes aren't plugged. A small hole on the back at the bottom, and two small holes behind the lower watch band pin.
  • Former Member
    0 Former Member over 6 years ago
    Thanks Ekutter...so the altitude stays on what I calibrated...Just changed from AUTO to BAROMETER and it doesn't get to 20000m anymore, but stay stuck on what I had calibrated...

    I'll try cleaning the holes... I did find the one back at the bottom...but was not able to find the othe two...can you, kindly, send me a picture?/

    many many tks

  • Former Member
    0 Former Member over 6 years ago
    oh!! just found the other two...tks!
  • Former Member
    0 Former Member over 6 years ago
    It didn't work! Everytime a start and end a workout, the altimeter gets back to 20.000m :(
  • Former Member
    0 Former Member over 5 years ago

    Same prob for me ... No solution ?

  • Former Member
    0 Former Member over 5 years ago

    some problem ... the altimeter stay to 20000 m.

    If I calibrate with GPS goes to correct value but when I start any activity go to 20000 m and don't change.

    any solution?

  • 0 over 5 years ago

    This has been an ongoing issue from the first barometric altimeter watch that Garmin made (910XT).  If you swim with the device, the barometer will eventually fail and will have to be replaced.  I've gone through at least five each 910's and 920's over the years.  I am currently considering getting a 945 or fenix 6.  I searched and found this thread because I was hoping that Garmin finally fixed the issue.

    Contact support and explain what the issue is.  If it's a failed barometer sensor, Garmin should replace the device for you.

  • 0 over 5 years ago

    Mine FR935 has also this issue. I have it now for a few weeks..it worked fine for 2.5years... (calibrating did not work)

  • Former Member
    0 Former Member over 5 years ago

    I have exactly the same issue

  • Former Member
    0 Former Member over 5 years ago

    I've the same problem. After 25 months working fine....