Common Questions What is the relief rating of the 100208453 valve

check the coil resistance

the internal diaphragm or SPST contacts have likely failed

What are the signs of a failing 78L03 reversing valve

As a direct replacement for Lennox 18J20

York 022-09577-000 Valve Stop 321702-401 Common Questions What is theThe York 022 09577 000 Valve Stop is a high precision 7 16 inch refrigerant shutoff valve engineered for critical isolation in commercial HVAC systems and centrifugal liquid chillers. Designed as a vertical angle stop, this OEM York replacement part provides technicians with a reliable manual point of control for regulating refrigerant flow, specifically within high capacity units like the York Millennium YCJF series. Its 7 16" x 1 2" configuration