Garmin edge 500 speed fluctuates

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converse2020
Posts: 29
Joined: Sun Mar 07, 2010 20:47 pm

Garmin edge 500 speed fluctuates

Postby converse2020 » Sat Mar 30, 2013 21:20 pm

Hi,

My 2 month old Garmin is playing up. Speed fluctuates from correct reading down to 0mph. I have the cadence sensor so i assumed a simple realignment of the rear wheel magnet would resolve but no such luck. In the house it works fine. Outside no good.
I tried riding today with GPS off but that made no difference.
Ended up turning off cadence sensor and then the speed reading (via GPS) was good - until I stopped at a cafe. I took the garmin in with me and the speed kept on reading - steadily rising to 40+ mph!
In the end turning off and on stopped it.

Any ideas ? - is this likely to be a faulty Garmin unit or cadence sensor or user error ??

Thanks

User avatar
amaferanga
Posts: 6595
Joined: Sun Apr 18, 2004 16:44 pm

Re: Garmin edge 500 speed fluctuates

Postby amaferanga » Sat Mar 30, 2013 21:24 pm

Try a new battery.
More problems but still living....

User avatar
narbs
Posts: 223
Joined: Fri Sep 22, 2006 22:35 pm

Re: Garmin edge 500 speed fluctuates

Postby narbs » Sat Mar 30, 2013 21:44 pm

Had exactly the same issue with mine until I changed the wheel size from auto to 2096mm (running 700x23) which sorted it. Might be worth checking what yours is showing.

I found that the GPS readings do go a bit wild sometimes which is why I wanted to use the speed sensor.

converse2020
Posts: 29
Joined: Sun Mar 07, 2010 20:47 pm

Re: Garmin edge 500 speed fluctuates

Postby converse2020 » Sat Mar 30, 2013 21:46 pm

Thank. Will try changing from auto and see how it works tomorrow.

gloomyandy
Posts: 475
Joined: Sun Jan 01, 2012 16:19 pm

Re: Garmin edge 500 speed fluctuates

Postby gloomyandy » Sun Mar 31, 2013 21:11 pm

Always worth pausing things when you take a GPS unit inside


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