Description
Lennox 49K03 Thermostatic Expansion Valve Overview
The Lennox 49K03 is an OEM thermostatic expansion valve (TXV) engineered for reliable refrigerant metering in 3-ton cooling systems. Designed for use with R-22 refrigerant, this expansion valve precisely regulates refrigerant flow into the evaporator coil, maintaining optimal superheat levels and maximizing system efficiency. It is a direct-fit replacement for compatible Lennox equipment, ensuring a straightforward installation with minimal downtime.
Key Features
- Designed for R-22 refrigerant systems
- Rated for 3-ton (36,000 BTU/hr) cooling capacity
- 1/4″ flare inlet and outlet connections for secure, leak-free installation
- Precisely meters refrigerant flow to maintain proper evaporator superheat
- OEM Lennox replacement part for compatible equipment
- Durable construction for long service life in residential and light commercial applications
Application
The Lennox 49K03 TXV is intended as a direct OEM replacement for Lennox split-system air conditioners and heat pumps utilizing R-22 refrigerant. Proper TXV operation is critical to system performance — a faulty or undersized expansion valve can lead to poor cooling capacity, compressor damage, or reduced efficiency. Replacing a worn or failed TXV with the correct OEM part restores system performance and protects the compressor.
Specifications
- SKU: 49K03
- Brand: Lennox
- Refrigerant: R-22
- Capacity: 3 Ton
- Connection Type: 1/4″ Flare
- Valve Type: Thermostatic Expansion Valve (TXV)
