Unlike universal knobs

ensuring the system shuts down the burner if heat exchanger temperatures exceed safe operational limits

it is specifically designed to transition and branch 1-1/8" OD tubing

mixed gases

it acts as a robust upgrade for 370V-only components

White-Rodgers 3L09-28 Limit Switch Unlike universal knobsFor 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