This is info from google search.....can someone tell me what auto mode means below
To Reset system
Adjusted the passenger side to full hot and the drivers side to full cold and put the system in auto mode.
Then, turned off the ignition and turned it back on. In auto mode
you will see the fan speed auto adjusting up and down.
Then, I reversed the settings, drivers full hot (90) and the passenger full cold (60). Put it in auto mode and turn off the ignition and then back on.
The system started working correctly after that. My guess is that somehow the system looses its reference point for temperature, so a restart or two in auto mode will put it back in sync. Hope this helps.