Sensor does not record heart rate

This article explains what to do when the Firstbeat Sports Sensor stays in standby or does not record heart rate.

Symptom

• The Sensor light blinks, but the Sensor does not record heart rate.
• The Sensor is visible over Bluetooth, but no heart rate appears.
• The Sensor did not record all sessions although the light was blinking.

Cause

• A blinking light only shows that the Sensor has power. No heart rate means that the Sensor gets no signal from the strap.

Solution 1: Check the strap and the Sensor attachment

1. Moisten the strap. Moisten the electrode area of the strap with water.
2. Tighten the strap. Wear the strap tight.
3. Attach the Sensor. Check that both pins of the Sensor are fully attached to the strap.

Solution 2: Replace a worn strap

1. Check the strap age. Replace the strap after about 6 months of daily use, at the latest after 2 years.

Solution 3: Replace the battery

1. Replace the battery. Put a new CR2025 battery in the Sensor. Do not use any other battery type.

Solution 4: Factory reset the Sensor

1. Download the data. Download the data from the Sensor first. A factory reset deletes all data and pairings on the Sensor.
2. Reset the Sensor. In the Firstbeat Sports: Coach app, tap … More > Support > Sensor factory reset and enter the Sensor ID. The Sensor ID is under the battery cover, next to the QR code.
3. Pair the Sensor again. Pair the Sensor with the athlete again.

Solution 5: Update the Sensor firmware

1. Update the firmware. In the Coach app, tap Sensors to open the Sensor management view and tap the blue microchip icon next to the Sensor.

If the problem continues

If the Sensor still does not record heart rate with a new strap and a new battery, submit the faulty device report. For other questions, ask the Customer Agent chat on this page or email support@firstbeat.com. Include as much information as possible to help us solve the issue faster.