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Edge 840 elevation incorrect after rain

My Garmin edge 840 elevation is way off and I recently rode through a rainstorm. Could this affect the elevation reading? It has been dry for a couple of days now and I tried calibrating several times. During today's ride it was gaining elevation while going downhill.

0 fabernova 5 months ago

Elevation inaccuracy during rain is a known problem, see previous post

0 bigboget 5 months ago in reply to fabernova

It says the page no longer exists. What's the name of the article? Is there a fix? The computer has had a week to dry

0 ciairo28 4 months ago in reply to bigboget

Same issue fixed in an easy way. Simply blow hard into the two small holes on the back of the device. If a little dust gets inside the altimeter goes crazy.

0 George 4 months ago

Yes, it can. The Edge uses a pressure-based altimeter. If you ride through a storm, you will get inaccurate altitude readings.

If it's still giving inaccurate readings even after a recallibration in calm weather, you likely have a faulty hardware or something stuck in the sensor.