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How do you know when a dexcom transmitter is not good?

Author

Amelia Brooks

Updated on March 10, 2026

How do you know when a dexcom transmitter is not good?

Starting at 3 weeks before the end of its battery life, the warnings count down the transmitter battery life until it has only 10 days – one sensor session – left. If the transmitter battery has less than 10 days remaining, you won’t be able to start a new session and will see “Pair New Transmitter” instead.

What to do if dexcom transmitter stops working?

If your transmitter is more than 90 days old and not working, you must use a new transmitter. If your transmitter is less than 90 days from activation, contact Global Technical Support for troubleshooting by requesting a call back or by calling 1-844-607-8398.

How do I connect my dexcom transmitter to a new phone?

On the new smart device, login to the app with your existing Dexcom Username and Password. Follow the set-up screens, if prompted. You may receive a pairing request on the new phone to connect it to the current transmitter. After entering the transmitter SN, you will be asked to enter a sensor code.

How do you reset a dexcom transmitter?

Sensor restarts

  1. Stop the session.
  2. Remove the transmitter from the sensor.
  3. Set a timer for 20 minutes once you’ve removed the transmitter.
  4. After the 20 minute wait, replace the transmitter into the sensor.
  5. Go through the usual steps to start a new session.

Why won’t my G6 transmitter connect?

If your transmitter didn’t pair with your display device and you are seeing a Transmitter Not Found alert, please try the below solutions: Make sure the transmitter is snapped into a sensor and is flush with the sensor pod. Make sure the transmitter SN in Settings matches the transmitter SN on the transmitter box.

How do I find my dexcom transmitter number?

Locate the ID on the bottom of the transmitter before attaching it to a sensor. The transmitter ID can also be found on the Dexcom transmitter box. In the Options menu, tap the Down Arrow > My CGM. Tap Press to Set Up located next to Transmitter ID.

How do I set up a new dexcom transmitter?

Pairing a new transmitter using your app You can manually stop your transmitter and sensor by going to Settings > Transmitter > Pair New. You will be prompted to stop your sensor if your current sensor session is still active. Then follow the onscreen prompts to pair your new sensor and transmitter.