depot pull
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Once the plenum temperature drops below the 205°F reset threshold
storage facilities
additional loops through the iris or an external CT may be required
this model is designed for flexibility
Key Benefits Precision-Balanced Design: High-tolerance engineering reduces noise and prevents premature motor bearing failure
York S1-7970-3281/A Limit Switch 326058-755 Once the plenum temperature dropsThe York S1 7970 3281 A Limit Switch is a critical safety component designed for precise thermal monitoring in residential and light commercial HVAC systems. This high limit cutout switch features a 145F Open (FOP) and 115F Close (FCLS) configuration, ensuring the furnace heat exchanger remains within safe operating parameters. Acting as a normally closed thermal disc, the S1 7970 3281 A interrupts the burner circuit if airflow is restricted or