Honeywell Home 1046759 Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup Error Codes & Status

5800 Series smoke, heat, or CO wireless life-safety transmitter — supervised fire/CO zone on compatible panels (5800CO, 5800COMBO, smoke SKUs).

Life-safety devices have stricter placement and testing requirements than burglary sensors. Follow NFPA/local code, use professional monitoring where required, and never substitute takeover modules for fire or CO hardwire.

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

• Device age — smoke/CO sensors expire; replace per label date.
• Zone type — fire vs burglary programming differs; do not bypass without authority.
• FireFighter placement — acoustic path to standalone smoke alarms.
• Monitoring — central station fire test procedures for monitored accounts.

Official Sources

• Resideo product page
• User's Manual: SM300-AC Smoke Alarm (English)
• SM300-AC Specification Sheet (English)
• More Information on Ionization vs. Photoelectric Smoke Alarms

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

Honeywell systems report faults on the panel and keypad status screens, zone list, and Total Connect 2.0 (when interactive service is active) — not as a single universal numeric code list across all models.

How to read status

1. Open panel status or installer menu → zones / troubles.
2. Note zone number, trouble type (open, tamper, low battery, missing, cell fail).
3. Cross-check Total Connect 2.0 device list if the account is interactive.
4. For cell issues, run installer communication test before replacing sensors.

Common trouble indicators

Panel actions (typical)

Source: 5800 smoke/CO install guide; Resideo official resources linked in this product folder manifest.