Schneider Electric (Barber Colman) MK-4621-422 Actuator 30067439-890 which is a common cause

which is a common cause of furnace pressure switch errors and system lockouts

Featuring a 12-inch 316 stainless steel rod

Common Questions Which actuators is the AM-602 compatible with

This primary limit switch features a 7" insertion length to accurately monitor internal heat exchanger temperatures

Schneider Electric (Barber Colman) MK-4621-422 Actuator 30067439-890 which is a common causeThe Schneider Electric MK 4621 422 is a heavy duty pneumatic valve actuator designed for precise proportional control in HVAC systems. Engineered with an 11 square inch effective area, this spring return actuator provides reliable linear movement for 1 2 inch nominal stroke applications. It operates on a specific 10 to 11. 25 PSI nominal spring range, making it ideal for sequencing and precise throttling of steam or water valves. The rugged NEMA 1