04-09-2016, 01:55   #1
Junior Member
Join Date: Feb 2013
Posts: 6
A300 HR and swimming
Having trouble getting the A300 to read my HR in any consistent fashion when swimming in a pool. It reads. Then it doesn't. then it does. I rinse the watch, the strap, the sensor (H7) and the sensor strap every time I swim. I have changed out the sensor battery twice. I purchased a new strap. I reset the watch to factory settings. Nothing seems to work.

Any recommendations that I can try?
K_Stewart is offline Reply With Quote
17-10-2016, 20:07   #2
Junior Member
Join Date: Jun 2015
Posts: 18
H7 and swimming
I had the same problem. Polar told me to buy the T31coded heart rate strap transmitter. It must have a stronger 5ghz signal. It works perfectly with my A300 in the pool.
It is worth spending another $40 or so for this item.

DrMushnick is offline Reply With Quote

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