Lennox 12J37 TXV 321894-706 The valve must be installed

The valve must be installed so the temperature sensing element is fully immersed in the hottest water in the tank

this kit is specifically for the "small thread" style Snap-Trap drains

ensuring continuous air removal during operation

It eliminates the guesswork during control board replacement by defining system-specific logic

Reliable flame rectification sensing for safe operation

Lennox 12J37 TXV 321894-706 The valve must be installedWhen you're out in the field facing a 5 ton residential split system with a collapsed suction pressure or hunting superheat, you need an exact replacement to get the job done right. The Lennox 12J37 TXV is a genuine R 410A thermostatic expansion valve designed specifically for Lennox indoor evaporator coils. Featuring a 3 8" ODM inlet and a 1 2" ODF outlet, this brass body valve ensures precise refrigerant metering across varying load conditions. It