Garmin Edge 840 keeps on losing sensor connections

[SCD]

I have an interesting and frustrating issue with my 840. Garmin SA seems in no hurry to answer my question or offer any form of support (strange for such a big company?). Maybe somebody came across the same thing - please let me know:

The units keeps on loosing contact to my HRM, power meter and phone. I seems like the Bluetooth and Ant+ radio function crashes. The problem persists even after a normal restart. All the sensors however are working. When this happens I usually continue to record the workout with my Fenix. The watch picks up the power meter and HRM immediately. The only way to fix the 840 momentarily seems to be to reset the 840 in a way that the "Connectivity Software" fully reloads. But it does not do this every time I do the '10s power button' reset. I do not know how to trigger the reload of the "Connectivity software" reliably. I could not make it do it the whole of last week and then suddenly it did do a reload and it was good for 2h and then lost connection again. Unfortunately this is making the unit unusable for my training. Btw, I have the latest firmware installed.

[Furbz]

i had the same issue with a 520 and a 530 unit i had. gave up on garmin and moved to hamemerhead.

no fix for it. i tried everything.

the 130 plus i have now seems ok. same with my fenix - no issues

painful and irritating 

i only moved back to garmin due to the better live tracking and safety - keeps the wife happy.

the hammerhead is a vastly better unit.

[DieselnDust]

38 minutes ago, SCD said:

I have an interesting and frustrating issue with my 840. Garmin SA seems in no hurry to answer my question or offer any form of support (strange for such a big company?). Maybe somebody came across the same thing - please let me know:

The units keeps on loosing contact to my HRM, power meter and phone. I seems like the Bluetooth and Ant+ radio function crashes. The problem persists even after a normal restart. All the sensors however are working. When this happens I usually continue to record the workout with my Fenix. The watch picks up the power meter and HRM immediately. The only way to fix the 840 momentarily seems to be to reset the 840 in a way that the "Connectivity Software" fully reloads. But it does not do this every time I do the '10s power button' reset. I do not know how to trigger the reload of the "Connectivity software" reliably. I could not make it do it the whole of last week and then suddenly it did do a reload and it was good for 2h and then lost connection again. Unfortunately this is making the unit unusable for my training. Btw, I have the latest firmware installed.

My 1030+ does this as well. Kicks out all sensors and it gives me premature low battery warnings.

no fix in sight other than to send it in to garmin for software reload or warranty replacement 

[UnclePolli]

had similar issues, where it connects for a while and then drops again, reconnect.  i did factory reset  disabled Bluetooth and just use the ant+ connection.  also swopped my gamin hr monitor with wahoo and no issues since.

[Andreas_187]

It sounds like the sensors are bouncing between your head unit and your watch? Have you tried it with all other devices well out of range?