System Protection: Acts as a safety limit to prevent the defrost heater from running continuously

This specific limit control is designed as a safety cut-off

including units 3509821 and 3509822

or blocked return air grilles that cause heat to build up beyond the 155°F threshold

the S1-025-26387-017 features factory-terminated connectors designed to minimize voltage drop and withstand the high-temperature environments common in residential air conditioning units and heat pumps

Hartland Controls CAP-30/440R Run Capacitor System Protection: Acts as aThe Hartland Controls CAP 30 440R is a heavy duty 30 MFD round run capacitor engineered for continuous duty in residential and commercial HVACR systems. Built to EIA 456 standards, this 370 440V run capacitor provides essential phase shift current to fan motors and compressors, ensuring high power factor performance and efficient motor torque. Its dual voltage rating allows for versatile field application, functioning as a reliable HVAC replacement