Miller AC/DC Polarity Selector Switch Assembly

Get Your Welder Back on Track

Is your Miller welder stuck in one mode? The Miller 220491 Polarity AC/DC Switch Assembly is the genuine replacement part you need to restore full functionality to your machine. Whether you are switching between TIG welding aluminum and stick welding steel, your polarity switch is the gatekeeper for the correct current flow. A faulty switch can leave you dead in the water or limit your machine's capabilities.

Don't risk your equipment with generic knock-offs. This OEM Miller part is designed to fit perfectly inside your machine, connecting seamlessly with existing wiring harnesses. It is built tough to handle the daily grind of the shop, ensuring that when you flip the switch, the machine responds instantly.

Swapping out a damaged polarity assembly is a key maintenance step in keeping your welder running like new. By using genuine Miller parts, you ensure that your machine maintains its factory warranty status and operates safely. Get back to welding with the confidence that your power source is delivering exactly what you ask of it.