Garmin HRM-Dual not working

Garmin HRM-Dual not working after less that 1 year. Should i change the battery? The spec states battery should last about 2-3 years. Any advice?

Top Replies

CristoMB over 3 years ago +17

We recommend replacing the batteries & performing a reverse polarity on your Heart Rate Monitor (HRM) by following the steps below.

Please follow the steps below to perform a Reverse Polarity on your…
2332359 over 1 year ago in reply to JoaoArriaga +4

Exact same issue here, and it used to work fine. Now it connects, shows say 72bpm for a few seconds, then nothing more. Have done the battery-flip reverse polarity solution, no joy. This is also with a…
8543760 over 4 years ago in reply to tomoooo +3

yea I have the same problem. Sent it back under warranty, get a 'new?' one.... same problem

All Replies

0 barbasma over 1 year ago in reply to 2106630

Yes, buying a new one.. the Pro.

I'm really bored, i've edge and fenix.. no problem, never

This is the worst money spent.

0 2265133 over 1 year ago in reply to CristoMB

this worked for me. customer service wanted me to buy another one but in a last ditch effort I tried this. tks.

0 Sebjau 11 months ago in reply to sensovision

looks like Garmin did this on purpose to get people change their hrm dual to hrm pro. Mine also stopped working after the update.

0 Grumpy from dawn till dusk 11 months ago in reply to Sebjau

Sorry, but: ***.

Fist of all, the HRM Dual is still sold. No use to deactivate Duals for existing users, when they will buy a new one.

Second, I have a HRM Dual in use for biking and rowing (and HRM Pro for running). It has the latest firmware and works fine. Absolutely no issues.

0 Data 11 months ago in reply to Grumpy from dawn till dusk

Even the old HRM-1 from 2011 still works perfectly fine.

0 8941284 11 months ago in reply to 2332359

Yeah, the exact same problem happened to me, I'm going to send it back under warranty. 72bpm and everything.

0 dmptman 11 months ago

I had my HRM when I purchased my Garmin Edge 520 some years ago. That last me maybe 5 years then in 2021 it stopped working and purchased a new one (newer model). I just now gave up on it after replacing the batteries 3 times in the last 2 months. One thing I did notice is that the mounts for the screws become brittle with time, likely due to sweat making its way into the device via the screws. This happened to both of my sensors and had to put electrical tape as one or two of the mounts completely came off. I was expecting that to last me another 5, unfortunately it only lasted 2 :-(
I'm not going to bother getting the Pro and might look for an alternative HR strap designed a little better and compatible with my garmin.

0 hamera43 10 months ago in reply to CristoMB

Hi. That dues t work and I don’t see how it would. If you flip the battery the positive side will contact the + and - terminals. It won’t reverse the polarity. Thus only works with hyperdrives in Star Wars

0 barbasma 10 months ago in reply to hamera43

Star wars... hyperguide!! Win!!!

0 Data 10 months ago in reply to hamera43

ChristoMB's procedure does work, but indeed has nothing to do with the polarity of the battery. You could use anything that is electrically conductive to bridge the + and - terminals so capacitors discharge and the sensor boots up without possibly retaining a previous state it was in. Using the inverted battery is convenient, it is at hand anyway, and can't inadvertently cause damage as it has no sharp edges. (Not taking into account you could accidentily short the battery.)

The procedure with the inverted battery has been around for decades, maybe related to when most (sports) watches were working on CR232 batteries, they could retain time and settings while changing the battery, so to get rid of those settings you would flip the battery for a moment.