use a multimeter to check for line voltage at the switch terminals

this part is an essential stock item for high-clearance installs where standard shorter leads fail to reach

using a genuine Sterling 11H07R00402-001 ensures factory-spec fitment and prevents the common alignment issues associated with universal fittings

provided the regulator body is a Maxitrol 325-5

York S1-028-12010-700 Sheave 30067439-890 use a multimeter to checkThe York S1 028 12010 700 Sheave is an essential component for any technician focusing on precise airflow calibration in commercial or residential systems. This heavy duty variable pitch pulley is engineered for high demand HVAC applications, featuring a 6. 55" outside diameter and a 1 3 8" fixed bore to ensure a reliable, concentric connection to the motor shaft. The adjustable pitch range of 4. 9" to 6. 4" provides the flexibility needed to dial in