Using a thermal camera (coolest thing in the world, by the way), I discovered that a GFCI outlet in my bathroom is hotter then the surrounding wall when nothing's plugged into it:
It's not boiling hot; just slightly warm to the touch. I never noticed it before I had a thermal camera. This is probably bad, but what does it mean? Should I replace it? Is my house about to burn down?
Update to answer several people's questions:
- The GFCI is on an interior wall covered with cementboard.
- The wiring is copper.
- All other non-GFCI electrical receptacles--including those on exterior walls--are any different from the surrounding wall in terms of temperature. Here's one on an exterior wall:
- I don't believe there are any downstream connections.
- The heat is emanating from the right side of the unit itself:
- The box is quite small; the sides of the GFCI are about 4mm away from the sides of the box. Not a lot of room for it to dissipate heat.