Superduty Heater Control Fix

My Superduty would only push air out to the defroster no matter where I set the heat & A/C controls. This video shows how I fixed it.

[@schluckowsky]

When You don*t have the vacuum, does it blow cold air (which is cooled from the AC) to the wind shield?
Is there a diagram incl. the cable colors for the "air selector switch" available and when Yes, where?
M.

[@michaellucas2534]

Great solution. Corrected my issue.

[@Mudford]

Glad I could help!

[@jaycole5353]

Going to try this later today

[@eliseosanchez1442]

very helpful thanks!!

[@tedyBear59]

What year is your truck

[@Mudford]

2002

[@obieacres4676]

It’s a vacuum leak

[@holeshot1721]

Grrrrrr im heater core out rn nd seeing that this is most likely my problem

[@RedNeckerboyz26]

🎉