2001 Deville pass. HVAC problem

Does the driver side cool at all, or just blow ambient? It sounds like you could have an actuator fault, but you could also have a base HVAC system fault as well. You can enter diagnostics on your vehicle to display fault codes, and if you have an actuator fault, it could have a code. Start with key on, by pressing the info button up, and on/off at the same time and holding. Eventually(within several seconds) it should illuminate all display, and you can release the buttons. The info center will eventually read ALL, when it does, press on/off again. The display should now read ALL CODES, press on/off again. What will happen, is all codes from all modules will display, in alphabetical order by module. IPM is the module we are most concerned with at this time. Record the codes and reply to this post. If you do not get them on the first run, just turn the key off and start over. You can not do any harm, unless you execute a clear codes command, and that takes more steps.

It sounds like at a minimum, you have low/no refrigerant, a compressor that is not functioning(it may be engaging but not compressing), or a faulty expansion device. Without having the equipment to recover and weigh what is removed, you have no idea what exists in the system. The same as when you charge it, I don't know what this freon restoration kit is, but it is not working. With a system like air conditioning, it is most economical in the long run, if you have it serviced/inspected by a facility that is equipped to diagnose/repair it.

The 419 and 429 are the ones that would relate to your fault. The 429 is a fa for the auxiliary temp control, which is part of the right actuator that is referenced in the 419. At first glance, I would suspect that actuator is bad. The 1004 is an internal module failure code, and if current, suggests replacement of the module that is setting the code, in this case the IPM. If it is history, I would disregard it at this point. I would still wager that there is another concern with the base A/C system, since the driver side blows ambient when commanded cool. It probably blows hot when commanded hot, correct?