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preventing common combustion issues such as delayed ignition or soot buildup
contractor-grade installations during service calls
25" NPT connection and optimized internal geometry provide superior flow rates compared to balanced-plug designs
000 hours under standard conditions
This kit ensures the internal solid-state power supply receives the correct 120V secondary voltage required to maintain ionizer and collector plate performance
York S1-2790-3171 Fan Switch 321894-706 preventing common combustion issues suchThe 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
