Description
The York S1-3400-3151 Auto Limit Switch is a temperature-responsive control component that monitors operating heat levels inside furnace and air handling equipment. It works automatically changing electrical contact status when temperatures increase to 175F and resetting after conditions decrease to 125F, allowing regulated cycling based on internal temperature changes. Within HVAC systems, it supports blower and heating circuit operation by controlling airflow and heat related to varying operating conditions. Mounted near the heat exchanger or air circulation section, it connects into the control wiring to manage component activity according to temperature fluctuations for balanced and consistent system performance.
