Lennox 78H40 Expansion Valve Refrigerant while the self-aligning ball bearings

while the self-aligning ball bearings ensure localized durability in high-cycle environments

Always verify the rating plate on the appliance before installation

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

This DPDT (Double Pole

preventing soot accumulation and heat exchanger stress

Lennox 78H40 Expansion Valve Refrigerant while the self-aligning ball bearingsThe 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