York S1-7680-3591 Limit Switch 320788-702 including those found in Reznor

including those found in Reznor unit heaters

The 35-66 series includes a combustion blower relay which the 35-65 lacks

technical specifications should be cross-referenced for high-temp gasket kits

protecting the motor bearings and reducing operational noise

ensure the total volt-ampere draw of your 24V components—such as contactor coils and thermostats—does not exceed this rating

York S1-7680-3591 Limit Switch 320788-702 including those found in ReznorThe York S1 7680 3591 Limit Switch is a critical safety component designed for high limit thermal protection in residential heating systems. As a professional grade L155 20F auto limit switch, this unit is calibrated to open the electrical circuit at 155F and features an automatic reset with a 20 degree differential, closing back at 135F. This specific model serves as the factory authorized successor to the York 300609025, ensuring seamless backwards