Electrical & Lighting

BuildingWrench repair guide

Electrical & Lighting

Exit Sign Not Lit: Facility Troubleshooting Checklist

An unlit exit sign may have lost normal power, failed LEDs, a bad battery or charger, or internal electronics trouble. Document and correct it promptly because it is part of the egress system.

Last reviewed 2026-09-12 · General facility-maintenance information, not a substitute for site procedures, manufacturer instructions, codes, or qualified professional judgment.

Safe first checksSkill: Beginner-friendlyFormat: Diagnose → Fix → Test
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Safety boundary

This guide stops before energized wiring or panel work. Use qualified electrical personnel for internal diagnosis.

Full troubleshooting steps are in Pro

The safety boundary, quick answer and stop-work conditions above stay free. Pro opens the likely causes, symptom table, step-by-step procedure and preventive maintenance for this guide.

Stop and call a licensed professional when

  • Required egress marking is lost
  • Circuit problem affects multiple signs
  • Internal wiring fault exists
  • Housing is overheated or damaged

Mistakes, FAQ, parts and tools

Pro opens the rest of this guide: common mistakes, field FAQ, the parts list, and the tools for the job.

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