Weird A/C problem
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Joined: Aug 2010
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Weird A/C problem
Hi all,
2002 V10-4WD Excursion. Around town the A/C seems to be fine. When I hit the highway it's fine until I exceed around 60 mph. Once it gets over 60 mph the airflow moves to defrost only. The weirdness occurs if I get within approximately 50 yards of (or overtake and pass) another vehicle. As I get close to, or pass, the other vehicle the vent function returns to normal briefly. After I pass and am in the "open" again the airflow goes back to defrost only.
I've looked through posts here and also searched You Tube for answers but nothing seems to match my conditions. Maybe it's the result of multiple component failures? Suggestions?
Thanks for any assistance!
2002 V10-4WD Excursion. Around town the A/C seems to be fine. When I hit the highway it's fine until I exceed around 60 mph. Once it gets over 60 mph the airflow moves to defrost only. The weirdness occurs if I get within approximately 50 yards of (or overtake and pass) another vehicle. As I get close to, or pass, the other vehicle the vent function returns to normal briefly. After I pass and am in the "open" again the airflow goes back to defrost only.
I've looked through posts here and also searched You Tube for answers but nothing seems to match my conditions. Maybe it's the result of multiple component failures? Suggestions?
Thanks for any assistance!
Thread Starter
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New User
Joined: Aug 2010
Posts: 15
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Thanks!
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Nope. The hubs only have vacuum applied during switching. It's probably the actuator valve or the line going to it. Most of the time, the valve's plastic body develops cracks causing the leak.
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