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Old 06-28-2012, 12:39 PM
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HVAC issue

Hey guys, I hopped in the truck after work today and no matter what setting I put the AC on, it would only blow out of the defrost. No floor, no vents, turned AC off and on, turned truck off and on, nothing but defrost!

WTF could be causing that? and has anybody else had this issue? I don't think it's hot enough out to make anything stick, only about 95 today. It was hotter than that every day last week. Any thoughts, suggestions?

Thanks,
Cliff
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Old 06-28-2012, 12:49 PM
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A vacuum leak, or a bad vacuum pump. Not that uncommon. Do you have a 4x4?

Sent from my SCH-I500
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Old 06-28-2012, 01:14 PM
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Send a message via Yahoo to Dave
Vaccuum leak
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Old 06-28-2012, 02:20 PM
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yep. 4x4...
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Old 06-28-2012, 02:32 PM
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Quote:
Originally Posted by WLDHRSE View Post
yep. 4x4...
Could be your hub seals. Disconnect and plug the two vacuum hoses that run down to your hubs, and see if the ac damper works correctly. That is assuming you have esof.

Sent from my SCH-I500
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Old 06-28-2012, 02:39 PM
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Also check the gray vacuum line near the oil fill tube. It some times gets bumped off either the inline heater hose valve or the nipple on front of the HVAC box.
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Old 06-28-2012, 02:47 PM
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Quote:
Originally Posted by Lilpooh View Post
Also check the gray vacuum line near the oil fill tube. It some times gets bumped off either the inline heater hose valve or the nipple on front of the HVAC box.
Very true. :thumbup: forgot that.

Sent from my SCH-I500
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Old 06-28-2012, 04:00 PM
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Quote:
Originally Posted by Lilpooh View Post
Also check the gray vacuum line near the oil fill tube. It some times gets bumped off either the inline heater hose valve or the nipple on front of the HVAC box.
That's what it was, thanks buddy! BTW, just changed the oil last night, didn't realize I even touched it!

EDIT: Thanks everybody!
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