The following indicates CARCAT Duo is functioning properly;
Note: Audible BEEPs may not be heard in a very noisy environment.
The BEEPs may not be audible in a noisy surrounding. Try a quieter location, else unit needs replacement.
If u can hear the audible BEEP, the unit is functionally working and it will still repel rats. If the unit is still under warranty period, you can avail a free replacement.
Get following checked by a car mechanic;
Still not working? Connect with us to get the unit replaced.