A/C controls
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Senior User
Joined: Apr 2003
Posts: 324
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From: TX
A/C controls
My a/c in my 03 EB goes from vents to floor or dash like it on a cycle. No matter the setting I cannot keep it blowing just out of the dash vents for more than a few minutes. It just switches back and forth and is very annoying. Any suggestions or tips???
Tuned
Joined: Jan 2005
Posts: 261
Likes: 1
If it like mine in that the changing is based on engine loading, which changes the vacuum:
- It is likely a vacuum leak, or
- what I hope: a check valve failing.
I hope it is in the under hood vacuum lines and not under the dash or in the controls themselves...
- It is likely a vacuum leak, or
- what I hope: a check valve failing.
I hope it is in the under hood vacuum lines and not under the dash or in the controls themselves...
Tuned
Joined: Jan 2005
Posts: 261
Likes: 1
Mine is a 2003 Navigator fully loaded and has the automatic dual a/c... Not that the details matter much, mostly the year:
Problem was (at least so far) in the 4 adapters that take the hard vacuum lines to their associated partsL:
- Vacuum canister (rectangular behind the battery)
- The two check valve set up where it takes vacuum from the engine and sends it to the above canister and to the a/c control vacuum line which goes through the "firewall" (though we can't call it that, right...)
They were really soft and the black wiped right off...
Changed them using vacuum lines - no cost...
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