Dash HVAC 2003 Land Yacht XL396

[rrstory]

I cannot get the control that changes the direction of air on the dash HVAC system. For example:
Defrost, Lower/Vents, Vents only, ect. Fan speed operates, Temperature operates, on/off operartes. HELP!

[HowieE]

The damper doors are most likely vacuum operated so check for small hoses under the dash and while the engine is running see if you have vacuum to the control.

If it is a diesel you will have a separate vacuum pump as a supply.

[rrstory]

Thanks, It is a diesel. I'll take a look under the dash.
Ray #4983

[HowieE]

The vacuum pump will be in the engine area. It may be belt driven or a stand alone unit.