Aluminum Wiring and GFCI Outlets
Aluminum wiring issues are frequently cited as a reason some jurisdictions require a licensed electrician, rather than a DIY swap, for any receptacle replacement on these circuits.
Why aluminum wiring behaves differently than copper
Aluminum expands and contracts more than copper with temperature changes, which can gradually loosen connections at screw terminals over years of normal heating and cooling cycles. A loose connection creates resistance, heat, and sometimes the exact kind of current irregularity that can trip — or damage — a GFCI.
What to do if you suspect aluminum wiring
If your home was built in the aluminum-wiring era and you're seeing warm outlets, flickering, or unexplained trips, this is a strong candidate for a licensed electrician inspection rather than DIY troubleshooting — connection issues on aluminum circuits are a known fire-risk factor, not just an inconvenience.