266622 - Miller 266622 Control Governor Module T4 (1500/1800 RPM)

Genuine Miller Replacement Control Module

The Miller 266622 is a specialized Control Governor Module designed for Tier 4 (T4) engine-driven welding machines. As a critical component of the engine management system, this module is responsible for regulating engine speed to ensure consistent performance during welding and auxiliary power generation. This specific unit comes pre-programmed with setpoints for 1500 and 1800 RPM operation, matching the factory specifications of compatible Miller equipment.

When an engine governor fails, it can lead to erratic engine speeds, inability to hold load, or complete shutdown, directly affecting weld quality and power output. Installing this genuine OEM part ensures that your machine communicates correctly with the engine's electronic control unit (ECU) and maintains compliance with Tier 4 emissions and performance standards. Because modern welder-generators rely heavily on precise electronic control, using the correct, pre-programmed module is essential for a successful repair.

This part is intended for professional repair and maintenance of industrial welding equipment. Please verify fitment using your machine's serial number before ordering, as electronic modules are often specific to certain serial number ranges or engine variations.