Symptoms
- Visible rust on the outside or inside of the panel box
- Corrosion or discoloration on breakers or bus bars
- Past water leak or flooding history near the panel location
Likely causes
- CommonPast water intrusion or leak near the panelA roof leak, plumbing leak, or flooding near the panel location is a common source.
- CommonHigh humidity in the panel's locationBasements, garages, and exterior panels are more prone to condensation and rust over time.
- PossibleAn outdoor panel with a failed or missing gasketExterior panels rely on gaskets and proper covers to keep water out.
What to do
- Do not open the panel's dead front cover yourself to inspect further.
- Note and fix the source of any water intrusion, like a leak or poor drainage near the panel.
- Avoid touching the panel with wet hands or in wet conditions.
- Have an electrician inspect the panel's interior for corrosion on breakers, bus bars, and connections.
- Ask whether affected breakers or the panel itself needs replacement based on the extent of corrosion.
- Improve ventilation or address moisture sources in the panel's location to prevent recurrence.
- Prioritize this inspection if the panel feeds your whole home, since corrosion can affect reliability and safety broadly.
When to call a pro
Call a licensed electrician to inspect any panel with visible rust or corrosion, especially after a known water leak nearby.
Safety
Use caution
Never open a corroded panel yourself or touch it with wet hands; corrosion can affect how safely breakers and connections function.