Honeywell Home 955PST - 3/4 in (9.5 mm) Plunger Switch with Screw Terminals, White Overview

5800 Series contact — compact 345 MHz one-way wireless door/window sensor (5800MINI, 5816, recessed variants) for VISTA with receiver, Lynx, and compatible panels.

On Honeywell systems, wireless devices are supervised zones on the panel — tamper, low battery, and missing signals appear as trouble conditions that may block arming depending on panel programming.

At a Glance

What This Device Does Well

Provides reliable supervised status at the panel and Total Connect 2.0 when installed, enrolled, and range-tested correctly.

Before You Service or Replace One

• Sensor SKU — 5800 Series one-way vs SiX two-way encrypted vs hardwired.
• Panel online — resolve panel AC/cell trouble before blaming sensor.
• Range — 5800RP repeater or move 5881EN/6160RF receiver path for distant zones.
• Battery type — use listed cell; replace all batteries in multi-cell devices.
• Tamper — cover fully closed before declaring hardware fault.

Official Sources

• Resideo product page

Use official Resideo install PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.