the York S1-1TVMBB1 is strictly for R410A refrigerant

Enhanced Thermal Durability: Constructed with high-grade winding materials to resist insulation breakdown in challenging HVAC refrigeration missions

Replacing a breached or scaled heat exchanger with this OEM furnace part restores factory-spec fuel efficiency and operational safety

This kit is the primary replacement for various York modulating gas furnaces

Trane CNT7660 Limit Switch R-410A the York S1-1TVMBB1 is strictlyAs a seasoned technician, you know that a tripped limit is rarely just a bad part; it is a symptom of airflow restriction or a failing blower. However, when the logic board throws a four flash code on an XR90 or RTU, the Trane CNT7660 Limit Switch is your primary diagnostic point. This genuine OEM Trane replacement part is a critical safety component designed to monitor plenum temperatures and prevent heat exchanger damage. Featuring an L120 30F