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Industrial-Grade Durability: Constructed from heavy-duty materials to withstand high-temperature combustion environments
Using genuine York replacement sensors and harnesses is the only way to ensure the York unit sensor compatibility remains within factory tolerances
normally closed solenoid valve engineered for heavy-duty refrigeration and air conditioning applications
Constructed with 54 blades to maximize CFM delivery
York S1-2790-3171 Fan Switch Freon Industrial-Grade Durability: Constructed from heavy-dutyThe 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
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