this unit delivers the tight tolerances required for modern high-efficiency systems

ensuring the combustion process only initiates when proper venting conditions are established

ensuring consistent manifold pressure despite fluctuating inlet conditions

you can use the normally closed (NC) contacts for the compressor circuit and the normally open (NO) contacts to trigger a remote alarm or indicator light when a high-pressure lockout occurs

York S1-025-32706-000 Switch 319848-301 this unit delivers the tightThe York S1 025 32706 000 Switch is a high precision OEM replacement heating limit switch engineered to maintain critical safety parameters in York residential HVAC and light commercial systems. This specific automatic reset limit switch is calibrated to open at 150F and close at 120F, effectively interrupting the electrical circuit to the burner or heating elements when internal plenum temperatures exceed safe operating thresholds. For field service