Frequently Asked Questions

Why Is My Honeywell L5100 Showing a Blank Screen?
The screen for a Honeywell L5100 will go blank whenever the system is not powered on. Restore power to restore the screen. Learn about the Honeywell L5100 Alarm System.
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Honeywell 5881ENH vs Honeywell 5881ENM
The 5881ENH and 5881ENM are both wireless receiver modules for VISTA Panels. The difference between them is the number of zones they support. Learn about these wireless receivers.
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Can I Program My VISTA 21iP To Use IP Only?
A brand-new VISTA 21iP comes with a built-in IP communicator for a wired ethernet connection. A cellular communicator will need to be added separately. Learn about the VISTA 21iP.
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How Do I Program a Honeywell Alarm With No Master Code?
The Master Code is not required when programming a Honeywell Alarm System. Instead, the Installer Code is used. Learn about Honeywell Alarm Systems.
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What Gauge Wire Should I Use for Door/Window Contacts?
Alarm Grid recommends using 18-gauge, 2-conductor wire for door and window sensors. But many DIY installers use 16-gauge or 22-gauge wire without issue. Learn about wired sensors.
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Will an Encore FireFighter FF345 Work w/ a CO?
The Encore FireFighter FF345 is a life-safety sensor takeover module that listens for the unique temporal sound of an activated smoke or CO sensor. Learn about the FF345.
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Does a 6280 Have a Built-In Receiver?
The Honeywell 6280 is a touchscreen keypad designed for use with a Honeywell VISTA Alarm System. It does not have a built-in receiver. Learn about the Honeywell 6280.
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How Many Repeaters Can I Add to a Honeywell System?
Technically, one wireless repeater can be added to a Honeywell System for each available wireless system zone. But most systems won't need more than one. Learn about repeaters.
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Why Did Honeywell Discontinue the 4GL and Replace it w/ the 3GL?
The Honeywell 4GL was the original name of the Honeywell 3GL Communicator. Both modules have since been discontinued. Learn about the Honeywell 3GL Cellular Communicator.
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How Do I Program an Encore FireFighter FF345?
The Encore FireFighter FF345 is a wireless life-safety sensor takeover module that can be auto-enrolled with a compatible system. Learn how to program an Encore FireFighter FF345.
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