My Garmin Forerunner 955 (still under warranty) was sent for service because it did not record the elevation correctly.
Garmin advises the device needs to be rinsed so the little hole where the sensor is does not get clogged. I've rinsed it regularly. I also understand windy conditions, weather and maybe temperature changes may affect the elevation readings. The following activity was in a forest with hardly any wind and the weather didn't change.
The device was eventually returned to me with the diagnosis: "our technician checked, and this unit has no issues. For altimeters you may need to do calibration."
So I calibrated it before last weekend's MTB ride, also wore a Suunto Race watch, and compared Garmin, Suunto and Strava data.
The results seem clear: While the Suunto and Strava elevation profiles are almost identical, the Garmin elevation is not only slightly off, but drifts all over the place and is completely unusable.
Has anyone recently experienced similar issues and what have you done to fix it? Any advice what may be wrong and what I should do about it would be greatly appreciated.
