Built to withstand the rigors of gas ignition systems

Standard 1/8" NPT threaded ports ensure compatibility with existing pneumatic tubing and fittings

opening the control circuit if differential oil pressure drops below the 6 PSI threshold to prevent catastrophic mechanical failure

the York S1-1TVMBB1 is strictly for R410A refrigerant

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

Trane CNT7660 Limit Switch R-410A Built to withstand the rigorsAs 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