--- title: Transmitter Zone Number Appears During Sniffer Mode But Does Not Clear description: Transmitter Zone Number Appears During Sniffer Mode But Does Not Clear --- [Skip to content](https://support.geoarm.com/honeywell/l3000troubleshootingguide/transmitterzonenumberappearsduringsniffermodebutdoesnotclear#main-content) English Show submenu for translations ![geoarm-by-alarmclub-logo-2024-transparent.png\]](https://support.geoarm.com/hs-fs/hubfs/geoarm-by-alarmclub-logo-2024-transparent.png?height=50&name=geoarm-by-alarmclub-logo-2024-transparent.png) Open main navigation Close main navigation - English Show submenu for translations - Visit GeoArm.com Visit GeoArm.com Hello. How can we help? - There are no suggestions because the search field is empty. 1. [Support Center](https://support.geoarm.com/?hsLang=en) 2. [Honeywell](https://support.geoarm.com/honeywell?hsLang=en) 3. [L3000 Lynx](https://support.geoarm.com/honeywell?hsLang=en#l3000-lynx) # Transmitter Zone Number Appears During Sniffer Mode But Does Not Clear POSSIBLE CAUSE a. Transmitter zone type (ZT) is set to 00 (Not Used). b. Transmitter battery not installed. c. 5800 System transmitter not "enrolled" in system.  REMEDY a. Set ZT to a valid active zone type in field ✻56. b. Install the proper battery. c. 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