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Old 04-22-12, 01:44 PM   #1
Tall Cool One
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Garmin Edge 500 Cadence/Speed Sensor Issue

I just bought an Edge 500. On initial set up everything locked in and the cadence was working correctly. On my first ride about 5 or 10 minutes into the ride the cadence quit working. This was the first ride after a very wet ride. I took the cadence sensor apart as much as possible and tried to dry it out and replaced the battery but I can't get it to pair to the Edge.

I keep going to the ANT+ Speed/Cad menu item, click the little white button on the cadence sensor and spin the crank and the green and red lights blink when the crank and wheel go around. I do this until the lights quit blinking. I then do a rescan and turn the crank for quite a while and it never pairs.

Is my cadence sensor cooked?
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Old 04-22-12, 09:22 PM   #2
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Start with the simple stuff: is the magnet close enough to the sensor in all relevant axes?
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Old 04-22-12, 09:26 PM   #3
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Start with the simple stuff: is the magnet close enough to the sensor in all relevant axes?
Yes. The light blinks brightly every time the pedal goes by and when the wheel magnet goes by.
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Old 04-23-12, 02:39 PM   #4
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To dry out wet electronics like this, I open any covers and leave the device in a warm place overnight. Anyplace that's not so hot you can't keep your hand on it. I've used the top of a hot water radiator, on the heating furnace, on a water heater, over or beneath an incandescent lamp, etc...

Another option is to flush it out with 91% or better isopropyl alcohol and then dry it over low heat. May seem weird but electronic circuit boards are routinely washed distilled water and/or alchohol during production.
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Old 04-23-12, 08:16 PM   #5
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Last night I placed the unit on the register in my house. When I tried to pair the unit to my Garmin Edge 500 today, it locked right on to the signal. I rode 2 hours tonight and it worked like a champ.
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