You missed the point.
If the drier and lines are getting cold, then the freon system is not blocked. The evaporator is still making cold air!
But that cold air is not reaching the cab, it's being diverted somewhere or mixed with hot air so it appears to be ambient air.
Sounds like the temperature blend door is only moving part way. There are 2 doors - one diverts the air from the defroster ducts, the other from hot to cold air. Playing with the A/C switch will show you which is which.
Look underneath the passenger side dash. Blower on High, operate the switch from cold to hot a few times - you'll see the lever move on the BLEND DOOR. Move the switch to the cold side - notice which direction the arm moves. Push it farther with your fingers. You should get cold air from the dash vents now.
As I stated before, depending on how old the TJ is, it may be vacuum operated, or it may be electric motors.
The vacuum diaphragm can fail, or the motors can fail.
Check the vacuum, or the power there, depending on what you have.
As I remember there are 3 wires to the motor harness, gnd, hot, cold. The motors run very briefly, controlled by the PCM, stopping in the position that is called for by the temp switch on the dash - that allows mixing of both hot and cold air for the desired cab temperature.
A dealer's DRB scanner, or a good aftermarket software program can operate the blend door from the PCM.
Typical failure - wherever it's getting it's ground goes bad.
A week? - dumb luck, rats, mice, or Murhy's Law.