[ImperialCrown]

One way to tell if it is the underdash temperature blend door or A/C system itself is to feel the A/C lines under the hood at the firewall with the compressor running. One should be warm and one should be cold. If both are about the same temperature, you have probably lost the refrigerant charge due to a leak.
If they are different in temperature, the underdash HVAC blend door is either stuck or way out of calibration or the motor or dash controls have failed.
Is this a manual (MTC) or automatic temperature control (ATC) with the digital temperature readout?

 

[John at J&S]

Thanks for your reply. This has the digital temp display.

I'll check the AC hoses that you suggested in a bit.

 

[John at J&S]

I took it to an independent shop yesterday, they dropped it off at their AC guy.

This morning he says I need a control panel and a vacuum panel, quote for new parts and labor is $750. He said to do it with used parts he would charge almost as much because he has to run around and get them, then they might not work.

 

[ImperialCrown]

Any HVAC/ATC fault codes? Have you or him tried resetting the control logic with a battery disconnect/pause/reconnect?
Note: A battery disconnect will erase any fault codes also.

 

[John at J&S]

No, I just gulped and authorized the work. It's been hot here...

 

[John at J&S]

Parts are not in stock, could take two weeks.