An FC code stands for “Failed to Communicate“. This basically means that the switchboard tried to dial out but their outgoing dial signal was not received successfully.
To get rid of the FC code, customers need to focus on the phone line. You may need to have it replaced or repaired to clear the code, but you should try quick fixes suggested by your alarm company first. That way, they can rest assured that they’ve done everything in their power to resolve the issue first.
Clearing the “com fail” message is easy. It’s simply a matter of sending a signal to the central station… Reset the cellular transmitter.
FC is an error code that indicates your security system is having trouble communicating with our monitoring center over the phone line.
If the panel is Honeywell, you can clear the FC code on your Honeywell detector by typing [Installer Code] +  + [*41*] + [*42*] + [* 54] + enter [#15] + [*55] +  + [*99]. This will erase the programmed phone number.
This means that your detector tried to communicate with the monitoring station but could not connect to it. It could be as simple as the phone line being dead due to the alarm or trying to do it during a storm and the phone wasn’t working when it happened.
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If your Panel is connected to cell towers and you are getting this error message, it means your Panel has temporarily lost connection to cell towers. Try restarting your panel. If the issue persists, please call our account specialists at 855-238-4826 for further assistance.
The beeping sound that the low battery alarm makes can become very annoying, but can be turned off by removing the dead battery from your home alarm system control panel. Be sure to replace the dead battery with a new one to keep your home alarm system working properly.