York S1-2790-3171 Fan Switch 321894-706 By preventing condensate backup

By preventing condensate backup

preventing common combustion issues such as delayed ignition or soot buildup

This kit ensures the internal solid-state power supply receives the correct 120V secondary voltage required to maintain ionizer and collector plate performance

Rated for 10A at 120/240VAC and 5A at 28VDC

000 hours under standard conditions

York S1-2790-3171 Fan Switch 321894-706 By preventing condensate backupThe York S1 2790 3171 Fan Switch is an essential OEM component designed for precise fan and limit control in residential heating systems. As an industrial grade furnace fan limit switch replacement, this part ensures optimal airflow by managing the blower activation cycle and providing critical high limit safety protection. This switch is the direct manufacturer specified equivalent for the F120 35F fan switch, engineered to maintain system integrity