Hi, I use the HRM pro and have the same problem. It is just 8 months old now. I never opened the HRM until it stopped working. Then I just went to change the battery and found a drop of water on the battery. I have not noticed a crack yet, but will look closer now. Find helpful customer reviews and review ratings for Garmin 010-13118-00 HRM-Pro Plus, Premium Chest Strap Heart Rate Monitor, Captures Running Dynamics, Transmits via ANT+ and BLE at Amazon.com. Read honest and unbiased product reviews from our users. Garmin HRM-Pro Premium Chest Strap Heart Rate Monitor. $135 at Amazon. $135 at Amazon. don’t work well with wrist heart rate monitors. For running, make sure your monitor doesn’t get in Hi everyone, Title is wrong 😂 just stopped working. Did a Wattbike workout this morning with HRM working fine, connecting to both Wattbike and Fenix 7X. Came to my evening workout and it just wouldn’t connect. Tried restarting watch, forgetting the HRM on the watch and trying to search again. Now the watch can’t find the HRM anymore. If you simply pair the HRM, wear it, and track a run with the HRM and Epix, running power should work automatically with the default settings. Default is that the HRM does distance and pace indoors, and GPS/Epix does distance and pace outside. You can change that in the sensor settings on your watch, but you probably don't need to. Same here. HRM-Pro updated to v8.8.0. Everything worked fine before the update. Now my heartrate is erratic going from 200+bpm to 0 and so on - when connected to the F45 monitor via ANT+. My husband has the same exact strap and his works just fine, and he did not perform a firmware update on his. Remove the cover and battery. Wait 30 seconds. Insert the new battery under the two plastic tabs with the positive side facing up. NOTE: Do not damage or lose the O-ring gasket. The O-ring gasket should remain around the outside of the raised plastic ring. Replace the front cover and the four screws. Observe the orientation of the front cover. I know it's a dead post, but since others may still want to know, I can say from the 255, you hold up, scroll to Sensors & Accessories, select HRM Pro+, then you can turn to Indoors or Always to track pace and distance only indoors or always. And you can choose for the HRM Pro-Plus to train distance or to not. moeringsen. .

garmin hrm pro not working