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

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

allowing for quick attachment to the armature tube without specialized tools

Common Questions What are the specific timing sequences for this model

including units 3509821 and 3509822

Hartland Controls CAP-30/440R Run Capacitor This specific limit control isThe 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