Miller 110C Coolant Temp Switch N.O.

Restore Your Welder's Cooling System

Is your Miller welder or cooler throwing temp codes or acting up? The Miller 214931 Coolant Temperature Sender might be the part you need to get back up and running. This 110°C Normally Open (N.O.) switch is a direct replacement for the safety sensor found in various Miller cooling systems. When your coolant gets too hot, this little device is the line of defense that saves your torch and pump from melting down. If your existing switch has failed—either by sticking open and not protecting the machine, or sticking closed and preventing the machine from running—swapping it out with this genuine Miller part is the fix.

Why This Part Matters

Liquid-cooled welding setups are workhorses, but they rely heavily on sensors to keep everything flowing at the right temperature. The 214931 is designed to trip at exactly 110°C. This is the "danger zone" for many systems, and having a reliable switch means your machine knows exactly when to take a break before things break permanently. Because it is a Normally Open switch, it sits quietly in the background until that temperature limit is hit. Once the coolant cools down, the switch resets (depending on the specific control logic of your machine), allowing you to address the cause of the overheating—whether it's a blocked radiator, low coolant level, or a failing fan—without having fried your power source.

Easy Replacement for Maintenance Pros

Replacing a coolant sender is a straightforward repair for most maintenance technicians. This unit features standard threading and connection points consistent with Miller's design standards, ensuring a leak-free fit when installed correctly. Don't risk your expensive power source or water-cooled torch on a generic sensor that might not trigger at the right moment. Stick with the Miller 214931 to ensure your equipment retains its factory safety ratings. Whether you are servicing a Coolmate or an integrated cooling system in a larger power source, this 110C N.O. switch is the spec-correct part for the job.