Why is the a/c compressor not working

What is your question?

I replaced a bad center console control then the a/c condenser was replaced a few years back and never got replaced correctly the front low side 10mm bolt attaching the line to the condenser was loose leaked all but I little fluid out. Repaired the leak went to recharge and the gauge shot to red on the recharging canister. But all the time filling the system I noticed the compressor clutch never engaged. Help what shoul I do now. Thanks

What makes this problem better or worse?

no the control is replaced you can feel the dif from set to Hot or Cold

How long has your 2003 Toyota Highlander had this problem?

Moms has had the controller intermittent for 3 years