Dexcom G7 issues can be frustrating, especially when you depend on continuous glucose monitoring (CGM) to manage diabetes. Whether it’s signal loss, inaccurate readings, or sensor failures, these problems can disrupt your routine and make it harder to keep your blood sugar in check. Many Dexcom users experience technical difficulties, but the good news is that most problems have simple fixes.
The Dexcom G7 is one of the most advanced CGMs on the market, offering real-time glucose tracking and customizable alerts. However, like any technology, it isn’t perfect. You might notice that your sensor disconnects unexpectedly, fails early, or displays incorrect glucose levels. When this happens, knowing how to troubleshoot can save you time and frustration.
This guide will walk you through the most common Dexcom G7 issues and how to fix them. By following these practical solutions, you can ensure your CGM stays reliable—helping you manage diabetes with confidence.
Dexcom G7 Signal Loss
Signal loss is one of the most common Dexcom G7 issues. This happens when the sensor loses connection with your smartphone or receiver, leading to missing glucose readings. Since the device relies on Bluetooth, factors like range, interference, and phone settings can impact performance.
How to Fix It:
- Check Bluetooth Settings – Ensure Bluetooth is enabled and not accidentally turned off. Airplane mode should also be disabled, as it blocks signals.
- Keep Your Device Nearby – The Dexcom G7 sensor has a 20-foot range. If your phone or receiver is too far, the signal may drop.
- Restart Your Phone or Receiver – A simple reboot can refresh your connection and resolve temporary issues. Turn your device off, wait a few seconds, and turn it back on.
- Reduce Bluetooth Interference – Other Bluetooth devices (smartwatches, wireless earbuds) can interfere. Turn them off temporarily to see if the connection improves.
- Close Background Apps – Some apps may interfere with Bluetooth performance. Close unused apps to allow Dexcom priority access.
If signal loss happens frequently, check for software updates on both your Dexcom app and phone. Updates often fix connectivity bugs and improve performance.
2. Dexcom G7 Sensor Not Working or Failing Early
Dexcom G7 sensors are designed to last 10 days, but some users report early failures. This can be caused by improper application, adhesive issues, or sensor malfunctions. If your sensor stops working before the full 10-day period, you might see a “Sensor Failed” message or experience frequent disconnections.
How to Fix It:
- Ensure Proper Application – Clean your skin with an alcohol wipe before inserting the sensor. Avoid lotions or damp skin, as these weaken the adhesive.
- Apply in the Right Location – The back of the upper arm is the recommended site. Avoid areas where tight clothing or movement could dislodge the sensor.
- Use Additional Adhesive – If your sensor peels off early, use Dexcom’s free over patches or medical-grade adhesive tapes for better security.
- Avoid Excessive Pressure – Sleeping directly on the sensor or wearing tight clothing over it can cause it to loosen or fail prematurely.
- Request a Replacement – If your sensor fails before 10 days, contact Dexcom Customer Support. They often provide free replacements for defective sensors.
If you experience repeated failures, consider rotating application sites and ensuring your skin is dry before inserting the next sensor.
3. Inaccurate Dexcom G7 Readings
Sometimes, Dexcom G7 readings don’t match how you feel. While the system is factory-calibrated, factors like dehydration, sensor placement, or pressure on the sensor can cause inaccurate readings.
How to Fix It:
- Allow the Sensor to Warm Up – The 30-minute warm-up period is essential. Avoid relying on readings during this time.
- Compare with a Fingerstick – If readings seem off, use a blood glucose meter for comparison. Remember, CGMs measure interstitial fluid glucose, which may differ slightly.
- Stay Hydrated – Dehydration affects interstitial fluid, making CGM readings less accurate. Drink plenty of water throughout the day.
- Avoid Pressure on the Sensor – Lying on the sensor while sleeping can cause compression lows, leading to falsely low readings. Try placing the sensor in a different location.
- Check for Sensor Wear and Tear – If the sensor is peeling or damaged, it may not function correctly. Secure it with adhesive or replace it if necessary.
If Dexcom readings consistently differ from your blood glucose meter by more than 20%, contact Dexcom support for troubleshooting or a sensor replacement.
4. Dexcom G7 App Not Working
The Dexcom app is essential for tracking glucose levels, but sometimes it won’t load, crashes frequently, or fails to display readings properly. This can be due to outdated software, compatibility issues, or storage problems on your phone.
How to Fix It:
- Update the App – Ensure you have the latest version of the Dexcom G7 app. Updates often fix bugs and improve performance.
- Check Device Compatibility – Some older smartphones may not fully support Dexcom G7. Visit Dexcom’s website to confirm compatibility.
- Restart Your Phone – A simple reboot can refresh your system and resolve app-related issues.
- Clear Cache and Free Up Storage – If your phone is low on storage, the app may not function properly. Clear unnecessary files and delete unused apps.
- Reinstall the App – If issues persist, uninstall and reinstall the Dexcom app from the App Store or Google Play.
If the app keeps crashing, check for operating system updates on your phone. Keeping both your phone and the Dexcom app updated can prevent software conflicts.
5. Dexcom G7 Sensor Error Messages
If your Dexcom G7 displays a “Sensor Failed” or “Replace Sensor Now” message, it may indicate a faulty sensor, poor placement, or connection issues. These errors prevent the CGM from providing real-time readings.
How to Fix It:
- Restart the Sensor Session – Sometimes, stopping and restarting the sensor session in the app can clear the error message.
- Ensure Proper Placement – Make sure the sensor is securely attached in a location with good circulation. Loose or improperly placed sensors may not work.
- Avoid Moisture Buildup – Excessive sweating or moisture under the sensor can cause errors. Keep the area dry and use a barrier wipe before applying a new sensor.
- Replace the Sensor If Needed – If troubleshooting doesn’t resolve the issue, insert a new sensor. Contact Dexcom support if this happens frequently.
- Check for Updates – If error messages persist, check for updates to your Dexcom app and phone software, as outdated versions may cause compatibility issues.
If sensor errors continue, Dexcom may offer free replacements for defective sensors.
How Can Aptiva Medical Help You?
At Aptiva Medical, we understand how important reliable CGM technology is for managing diabetes. As a trusted medical supply provider, we ensure patients across the United States get the Dexcom G7 supplies they need without hassle. Whether you’re troubleshooting issues or need replacement sensors, we’re here to help.
Why Choose Aptiva Medical?
- Nationwide Shipping – We deliver Dexcom G7 supplies straight to your home.
- Insurance Assistance – We work with most insurance plans to get you the best coverage.
- Expert Support – Have questions? Our team is ready to help with any Dexcom G7 issues.
Visit Us: 5249 NW 33rd Ave, Fort Lauderdale, FL 33309
Call Us Today: (800) 310-2568
Let Aptiva Medical take care of your Dexcom needs so you can focus on living well. Contact us today!
Frequently Asked Questions
Can I wear the Dexcom G7 sensor while swimming or showering?
Yes, the Dexcom G7 sensor is water-resistant and can be worn during activities like swimming or showering. However, it’s advisable to limit exposure to water to ensure optimal sensor adhesion.
How should I store unused Dexcom G7 sensors?
Store unused sensors in a cool, dry place at room temperature, away from direct sunlight and moisture, to maintain their effectiveness.
Can I travel by air with my Dexcom G7?
Yes, you can travel by air with your Dexcom G7. It’s recommended to carry a medical device notification and be prepared for potential additional screening at security checkpoints.
Does the Dexcom G7 integrate with other health apps or devices?
Yes, the Dexcom G7 can integrate with compatible health apps and devices, allowing you to consolidate your health data for comprehensive monitoring.
