such as a clogged MERV-rated air filter

Frequent tripping usually indicates an overheating issue often caused by a dirty air filter

As a straight-thru-flow regulator accessory

this SPST (Single Pole Single Throw) switch opens on temperature rise

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

MARS 12921 Run Capacitor such as a clogged MERV-ratedThe 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