engine must warm up to normal operating temp before a c will work...it works
great when it comes on...temp control works,,,passenger side works...it will
never run if it's not up to temp...sometimes turning the engine off, then
restarting will work but only after it's up to temp...any ideas ???
Here is a good read on A/C systems. http://www.underhoodservice.com/a-c-update-the-logic-behind-automatic-temperature-controls/
Search Cadillac DTS Questions
Cadillac DTS Experts