Lennox 78H40 Expansion Valve Refrigerant this part number is frequently

this part number is frequently cross-referenced with and can replace several 42-19736-XX series and 8201-5537 variations

This DPDT (Double Pole

the STT17A-610R ensures reliable head pressure control and prevents the waste of cooling water during compressor standby

Common Questions Is the Watts 0063231 compatible with vertical installations

Lennox 78H40 Expansion Valve Refrigerant this part number is frequentlyThe Lennox 78H40 Expansion Valve is a critical 6 ton thermostatic expansion valve (TXV) engineered for precise refrigerant metering in high capacity light commercial and residential cooling systems. As a veteran grade HVAC replacement part, the 78H40 (identical to Lennox 78H4001) regulates refrigerant flow into the evaporator coil by sensing heat load changes, preventing liquid slugging and ensuring the compressor receives superheated vapor. This TXV