Replacing Faulty CGM Sensors

How to get support and replacement sensors

This page was created October 2026

Sometimes CGM sensors stop working earlier than expected. It does not happen often, but it can happen. If your sensor fails early, DON’T PANIC; replacements are available directly from the manufacturer (HSE MMP Poster for Preferred CGM Sensors, August 2026) and not from your Chemist.

Faulty CGM sensor? Here’s what to do

Contact the CGM company directly, rather than your pharmacy, for technical support and replacement options.

HSE MMP Poster for Preferred CGM Sensors, August 2026


Contact details by CGM company

Here are some of the options to get Technical Support or Report your faulty sensor & order a replacement.

Freestyle Libre Products (Abbott Diabetes Care):  

Products: Freestyle Libre 2, Freestyle Libre 2 Plus, Freestyle Libre 3 Plus 

Phone: 1800 776 633 
Hours:  

  • Monday to Friday: 8am–8pm  

  • Saturday: 9am–5pm 

Online support: 

 

Dexcom Products:  

Products: Dexcom ONE+, Dexcom G6, Dexcom G7 

Phone: 1800 827 603 
Hours:  

  • Choose from the options depending on if you have a Dexcom Account and follow the directions.
     

Minimed Medtronic  

Products: Guardian 4, Simplera and other MiniMed diabetes products  

Phone: 01 5111444 
Hours: 24/7 technical product support 

Online support: 

  • Through the Carelink App  

 

Roche Diagnostics Ltd 

Products: Accu-Chek SmartGuide 

Phone: 1800 121 416  
Hours:  

  • Monday to Friday: 8am–6pm (excluding bank holidays) 

Online support: 

Request a call-back through the Product Support contact us form Link: https://www.accu-chek.co.uk/contact 




Contact details, opening hours and support processes can change.

We recommend checking the manufacturer’s official website for the most up-to-date information.

This page is intended as a general information resource and does not replace medical advice or manufacturer guidance.

 
CGMs in Ireland
Getting a CGM