The Nordyne 626409R Limit Switch is a critical safety component engineered for forced-air furnace applications

though mounting in an upright position is recommended for maximum accuracy

Common indicators include the system shutting down on a "limit open" fault code or the indoor blower running continuously while the heating circuit remains de-energized

ensuring accurate temperature regulation without the environmental hazards of older mercury-switch models

Air migration from behind wall cavities can skew readings

Belimo ZG-LF2 Adaptor Kit The Nordyne 626409R Limit SwitchThe Belimo ZG LF2 Crankarm Adaptor Kit is a field proven solution designed for non direct mounting applications of Belimo LF Series actuators. Engineered for damper linkage conversions, this T bracket kit facilitates the mechanical connection between the actuator and the damper shaft when space constraints or shaft orientation prevent direct coupling. The assembly includes a heavy duty crankarm and a mounting bracket, ensuring structural rigidity