Many factors contribute to the successful function of a Normal Button, and installation is certainly a key one.

If your unit was installed by an Accredited Installer from the Normal Institute of Certified Button Installers and Technicians (NICBIT), you may have a Service Plan entitling you to free or discounted repairs. Check with your local installer for more details. If not, it might be worth reviewing your installation procedures to see if there were errors or issues not mitigated for.