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Old 09-10-2006, 02:20 PM   #1
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Default Electronic Climate control / AC problems

I have a 99 SLE with electronic climate control. No matter what mode I use for the AC, whether it is windshield, vents, vents&floor, or floor only, the result is only the AC coming out on the windshield in the top of the dash board. The AC does not switch to the vents. Although the rear vent in the back for the rear passenger seats work, the front vents do not. Some help would be greatly appreciated, its hot in Florida!!! Need AC to work correctly!
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Old 09-10-2006, 02:36 PM   #2
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You will want to check the purple hose under the dash on the passenger side to ensure vacuum is being supplied to the hvac programmer. The windshield and floor are the defaults for the system.

Although it was found that their are collapsing nipples in the programmer connector. This collapse causes vacuum not to be diverted through the programmer. The below is a great link to the fix

http://www.imcool.com/articles/airco...acuum_line.htm
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Old 09-10-2006, 03:41 PM   #3
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Default Re: Electronic Climate control / AC problems

Quote:
Originally Posted by srirachasauce
I have a 99 SLE with electronic climate control. No matter what mode I use for the AC, whether it is windshield, vents, vents&floor, or floor only, the result is only the AC coming out on the windshield in the top of the dash board. The AC does not switch to the vents. Although the rear vent in the back for the rear passenger seats work, the front vents do not. Some help would be greatly appreciated, its hot in Florida!!! Need AC to work correctly!
You can check for vacuum to the inside portion of the system by taking off the hush panel under the passenger dash and pulling the purple (violet) line off where it meets the incoming black plastic line from the engine compartment and verifying your vacuum there -- or you can run the motor and switch from floor, bilevel, dash, windshield&floor and listen to see if the other control vanes are being moved by their vacuum motors. You can even shut the motor off and should hear these for a half minute or so with the key "on" if you switch between the different modes. That would be an easy check to see if you're getting vacuum to the inside of the car.

My 98 passed those tests. I checked to see if the vane for the dash vents was getting vacuum, it'* on the driver'* side and I don't recall the color vacuum tube to it.

I did the fix shown in the link I had posted on an earlier discussion where you cut out the plastic connector that goes soft. and directly connect the lines from inside the programmer to those outside the programmer. I used 1/8 inch gasline line pieces slipped over the outside of the vacuum tubes.

The programmer box has electrical connectors on the front, one small one on the top and a rod on the botton that snaps into a white plastic piece to a vane inside the heater box. And two screws. Easy out.
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