Heart rate monitor a Pulsar chest strap, communicates for the first 13-23 minutes. Then stops communicating with the treadmill. The handlebar sensors still works when gripped. I have tried changing the battery in the chest monitor. Still works for only the first 13-23 minutes. Also tried replacing the reciever in the treadmill. Still no solution.

Exercise & Fitness - Life Fitness - 9500HR Next Generation Remanufactured Treadmill