Question about Garmin Edge 305 GPS Receiver

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False elevation reading with garmin edge 305

Garmin Edge 305 shows constant elevation of 65616 ft. My true elevation is closer to 200 ft

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  • dan44219 Aug 28, 2008

    garmin tech support said the unit needed repair. since it was brand new they recommended that i just exchange it for a new one at the retailer that i purchased it

  • cam_99 Dec 03, 2008

    I have the same problem. Also some screwy HR and speed numbers.

    I've emailed Garmin to see what they say - out of warrenty too I'm afraid



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  • 73 Answers

Perform a software download from by logging onto the site and downloading the webupdater

Posted on Mar 27, 2010


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1 Answer

Edge 305 giving inconsistent and inaccurate elevation readings. everything else is cool. any thoughts?

Same for me very often.
I think this is due to starting a road without waiting long enough that sattelites are acquired.

In fact 3 sattellites allow to compute position, 4 are necessary to compute position plus altitude.

Accuracy of position and altitude is much better from 5 sattellites acquired.

So I advise to start your device OUTDOORS, in an open place (not near walls as it masks sattellites) and wait until screen automatically moves to run mode, meaning enough sattellites are acquired.
You will get better chances to have a good accuracy.

Also on Garmin connect site, when you load your ride, you can correct altitudes automatically using real maps.

Dec 31, 2010 | Garmin Edge 305 GPS Receiver

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Can i order a new LCD for a garmin edge 305 and mount it myself?

Difficult to open it. If you do, warranty is over. There is a web site explaining how to open device :

Aug 10, 2010 | Garmin Edge 305 GPS Receiver

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My garmin 305 edge cuts off while the battery shows full strenght. What could the problem be. i was told this is a problem that alot of cyclists encounter. Greg

It is a contact problem inside the device, Details of how to fix at following link

Jun 25, 2010 | Garmin Edge 305 GPS Receiver

1 Answer

My garmin edge 305 freezes up during the ride on occasion. the distance and elevation numbers just stop changing, while I'm still riding. thanks

OK, There is a battery problem where the contacts become loose within the unit, i opened mine and followed the instructions i got on this site...MTB gurublog If you decide to do so..however if the 305 is in warranty contact and ask for new unit... they accept the problem is widespread.

Nov 01, 2009 | Garmin Edge 305 GPS Receiver

1 Answer

I am charging the Garmin Edge 305 for 24 hrs or for at least over night, yet the Edge 305 will show 2 to 3 bars of charges and will last maximum 1 hour of riding time. What to do?

Discharge completely device then charge again for 8 hours.

If not working, then attempt Soft reset :
Hold mode and lap/reset for 10 seconds then release.
Start the device then by long press on start. DEvice should start and charge then

Mar 16, 2009 | Garmin Edge 305 GPS Receiver

1 Answer

False Elevation Edge 705

I have exact same problem. It has been working for 5-6 months but suddenly on one trip it now reads app. 280 meters too high elavation

Sep 03, 2008 | Garmin Edge 305 GPS Receiver

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Edge 305 turns off at every little bump in the road?

The above link no longer works.
But this one does (for now):

I made this surgery and it now works great.

Aug 18, 2008 | Garmin Edge 305 GPS Receiver

1 Answer

Garmin 305 edge

Re-register it, Re-update it at Garmin
Should be good

Hope this helps

Aug 14, 2008 | Garmin Edge 305 GPS Receiver

1 Answer

305 Elevation Problem

Sorry to have to break (no pun intended) this to you, but I have had two units do this. Once this problem starts eventually the Elevation field will display and stay at 65616. The problem is with the barometric altimeter and cannot be fixed without sending the unit to Garmin. When you call Garmin technical support, they will have you do all sorts of resets - be patient - eventually they will concede that the unit is busted and give you an RMA. Both times this happened was after the unit got a little roughed up (one time dropped it, the other time was mountain bike tumble) - evidently the altimeter is the least robust part. Good luck.

Jul 28, 2008 | Garmin Edge 305 GPS Receiver

1 Answer

Wrong elevation showing garmin etrex vista

Found a fix, by resetting all user data my problem was fixed.
Garmin Edge 305 Power off device and hold 'mode + power'
eTrex Vista Power off device and then hold 'page + enter + power'
Hope this helps!

Dec 16, 2007 | GPS

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