Ive Got a Weird Issue

"Denver Is Stuck In The 90s" (denver80222) 05/10/2016 at 23:46 • Filed to: All the HVAC hits the floor

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The heat in my truck is extra toasty and the R-12 stays frigidaire cold. But no matter what setting I have it on, it only blows out of the floor vents and the defroster. What did I break?

Funktheduck > Denver Is Stuck In The 90s 05/10/2016 at 23:51

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I’m not sure but I think the older slider type HVAC controls operate on vacuum lines or cables (don’t remember). Something probably popped off.

My truck has the same issue except it's either floor or defrost. I have to push it hard to get it into defrost from floor.

Jcarr > Denver Is Stuck In The 90s 05/10/2016 at 23:55

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Blend door?

Denver Is Stuck In The 90s > Jcarr 05/11/2016 at 00:00

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Nah, I can switch between A/C and heat

Birddog > Denver Is Stuck In The 90s 05/11/2016 at 00:00

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You have the Blend Door Blues.

Denver Is Stuck In The 90s > Birddog 05/11/2016 at 00:02

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Why do you say that

Nibbles > Denver Is Stuck In The 90s 05/11/2016 at 00:02

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Vacuum leak most likely.

Nibbles > Jcarr 05/11/2016 at 00:03

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If it was a heat/cool issue, I’d agree. Since it’s a position issue, I vote vacuum problem

Denver Is Stuck In The 90s > Nibbles 05/11/2016 at 00:03

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My ac system has been whistling for a bit after I turn the truck off. I’ll have to find a vacuum diagram

Jcarr > Denver Is Stuck In The 90s 05/11/2016 at 00:05

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Mode door/motor.

Denver Is Stuck In The 90s > Jcarr 05/11/2016 at 00:09

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My hvac control is a mechanically actuated vacuum system