For veteran technicians servicing International Environmental (IEC) systems

For high-cycle environments

this 49K36 pilot orifice provides the reliable seating and gas metering necessary for peak furnace performance

Using genuine York replacement parts ensures that the mounting footprint and electrical terminal spacing align perfectly with existing wiring harnesses

Common Questions Is the CO-11 gasket interchangeable with other McDonnell & Miller series

York S1-025-27760-001 Temp Control For veteran technicians servicing InternationalThe York S1 025 27760 001 Temp Control is a specialized Single Pole Double Throw (SPDT) thermostat designed for precise temperature management in HVAC systems. Engineered for reliability in commercial air conditioning and refrigeration applications, this control features fixed setpoints with a 45F Open and 60F Close configuration. This specific temperature range is critical for managing defrost cycles and preventing evaporator coil freeze up. As an