optimizing service time for field contractors

As a straight-thru-flow regulator accessory

Prevents common pressure switch errors caused by vacuum or pressure loss at the blower interface

verify your valve body construction—threaded or solder—before attempting replacement

Common Questions & Technical Support:

MARS 12921 Run Capacitor optimizing service time for fieldThe MARS 12921 Run Capacitor is a fundamental component for maintaining the efficiency of single phase electric motors in HVAC and refrigeration systems. This 40 MFD 370V oval run capacitor is engineered for continuous duty, providing the necessary phase shift to keep compressors and fan motors running cool and stable. Built to UL 810 standards, it features a non PCB, oil filled aluminum construction and a patented internal pressure sensitive