White-Rodgers 3L09-28 Limit Switch 82 sq in effective diaphragm

82 sq in effective diaphragm area remains consistent with original specifications

Can I use this to replace the 21L9901

If voltage is present but the contacts fail to close or show high resistance (ohms)

Substantial Build Quality: Plated steel construction resists corrosion and mechanical fatigue in demanding HVACR environments

a dirty air filter

White-Rodgers 3L09-28 Limit Switch 82 sq in effective diaphragmFor service technicians requiring a precise thermal safety solution, the White Rodgers 3L09 28 Limit Switch delivers industrial grade performance in a compact 1 2" bimetal disc package. This board mounted limit control is specifically engineered with a 3. 12" insertion length to monitor internal plenum temperatures effectively. The switch features a fixed open temperature of 210 degrees F and a fixed close temperature of 180 degrees F, providing a