The rear AC stopped working.
The thermostat is analog. I am not sure if the thermostat is working or not.
Is there any way to use a jumper cable to start the AC? Below are the wiring diagram I found online.
(https://www.foreforums.com/MGalleryItem.php?id=4809)
Like short the yellow and red will start the compressor.
Try to rule out the thermostat issue before the ac unit
Just want to close this post, the thermostat was removed completely.
Instead, I use the ceiling assembly to control the AC. Much simpler.