or debris from entering the diaphragm chamber

As a veteran-grade replacement for the L-307-1

converting thermostat signals into a format compatible with advanced rooftop units

The T-4002-201 is typically sold as the internal thermostat body

Lennox 98L78 Tubing 320074-702 or debris from entering theThe Lennox 98L78 Tubing is a critical OEM replacement kit used for establishing airtight connections between furnace pressure switches and intake exhaust components. This high temperature pressure switch square tubing is engineered to withstand the rigorous thermal cycles found in modern condensing gas furnaces. As a veteran grade HVAC replacement part, this kit features an approximate 3 16 inch ID (inner diameter), ensuring accurate pneumatic signals