I cannot see heart rate on my Nike+ - what to do?
Polar has identified a recent manufacturing issue with some Polar WearLink+ heart rate sensors. The issue can prevent the units from connecting to Nike+ products. Only certain batches are affected. Please check your Polar WearLink®+ transmitter Nike+ serial number. You can find it printed on the back of the sensor. Affected products' serial numbers start with:
If you have one of these products, please contact Polar customer care.