Quote Originally Posted by duckman06 View Post
I wonder why it only has a 3 ton or 4 ton txv listed? I mean if the outdoor unit is 3.5 tons then the txv selection would not match.

I most be missing something? Because with a 4 ton txv on air handler and not a 3.5 wouldnt the system not meter right? I could be over thinking this!!!
Yes Lennox used two different expansion valves there part numbers as I remember are 56J20 & 56J21 respectively. They are R22 TXV's. Not sure if they are the same number.