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Issues include physical damage (e.g., broken needle, cannula or needle retraction issues, etc.), deployment issue, or painful insertion. Please report the issue online or contact one of the support departments at Dexcom.

Issues include physical damage (e.g., broken, detached, missing sensor wire, etc.), no initial calibration, sensor failure during 2 hour warmup, new sensor inserted but “No Restarts” (Alert 25) displayed, inaccurate CGM values, the calibration prompt will not clear, early sensor expiration, sensor failure after 2 hour warmup, the pump displays “---“, the pump displays “Wait up to 3hrs”, the Dexcom Mobile App displays “Sensor Error”, or calibration errors. Please report the issue online or contact one of the support departments at Dexcom.

Issues include pairing failure on the Dexcom Mobile App, unintended once per day calibration mode, physical damage, latch issues, difficulty inserting or removing transmitter, low transmitter battery alert, transmitter failed, overheating, or shocking. Please report the issue online or contact one of the support department at Dexcom.

Issues include a loss of connection only on the pump or only the pump displays an invalid Transmitter ID (Alert 29). Please contact the Techincal Support Team (877-801-6901) at Tandem Diabetes Care. If the Dexcom Mobile App is also not receiving data, then Dexcom will handle these issues instead. Please report the issue online or contact one of the support departments at Dexcom.