Enhanced Safety: The manual reset mechanism acts as a high-temperature cutout to protect downstream components from thermal runaway

Component Protection: Shields the venter motor from direct heat exposure and mechanical debris

and Payne HVAC assemblies

providing all necessary critical seals to restore leak-free operation

Lennox 14W77 TXV L99H008 Enhanced Safety: The manual resetThe Lennox 14W77 is an OEM thermostatic expansion valve (TXV) engineered for high precision refrigerant metering in residential and light commercial R410A systems. Designed as a direct 100254 02 replacement, this valve features 3 8" x 1 2" ODF connections and is critical for maintaining the balance between liquid and vapor in the evaporator. By accurately regulating the refrigerant flow based on load demand, the 14W77 prevents compressor floodback and