Why do my lights flicker when large appliances turn on?

Flicker or dimming when a large motor starts often indicates voltage drop or loose connections; it can be benign in older homes but sometimes signals neutral problems, undersized service, or failing breakers. If flickering is new, widespread, or accompanied by burning smells or warm devices, turn off the affected circuit and call a licensed electrician for testing.

This page is for general education and does not replace advice from your Authority Having Jurisdiction or a site-specific electrical assessment. ARC Electric is licensed in California (CSLB #1079430) and serves Milpitas, CA 95035, and Santa Clara County.