The answer to 'why is my GFCI outlet burning smell' is that a burning smell from a GFCI (Ground Fault Circuit Interrupter) outlet is typically a sign of an electrical issue that requires immediate attention. This could be caused by a short circuit, overloaded circuit, or a faulty GFCI device.
Some common symptoms include a burning smell, discoloration of the outlet, tripping of the GFCI, or even sparks or smoke. If you notice any of these issues, it's important to stop using the outlet immediately and investigate the cause. Attempting to troubleshoot or repair the issue yourself can be dangerous, so it's generally best to call a licensed electrician to diagnose and fix the problem.