Manual control heater knobs or Climatronic Panel?

Thomas

Climatronic Panel

Try to spot the lever for the "Temperature Flap Control Motor" by looking under the dash to the right of the gas pedal.


If the lever is attached, could be a motor issue.

Sometimes, performing "basic settings" with a scan tool, can re-align doors that solve temp / flow issues.

Thomas

can you open it manually

You might be able to reach it... but am not sure.

The only time I have ever gotten close, was when I removed the dash to do a heater core... but the focus was on the core at
that time, so I can't recall of what kind of access I had before or during the core removal.

Thomas