minimizing system downtime for contractors and facility managers

serving as the primary defense against heat exchanger failure and overheating

As the direct S1-025-37378-000 replacement

If the ignitor does not glow or shows an "open" circuit reading

and most common non-corrosive refrigerants

Lennox 78L19 Expansion Valve Refrigerant minimizing system downtime for contractorsProper refrigerant metering is the backbone of any reliable HVACR system, and the Lennox 78L19 Expansion Valve is a critical component for maintaining precise superheat. Designed for high performance residential and light commercial equipment, this Thermostatic Expansion Valve (TXV) is chemically compatible with both R 410A and R 22 systems. The 78L19, which is identical to 78L1901, features a durable brass body with threaded connections, making it a