Question about 1994 Buick LeSabre

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1994 lesabre AC

AC comes out of defrost sometimes. Not all the time. Can hear AC compressor cutting on and off quickly sometimes. Not all the time. Had system vac and recharged. Worked good until next day. Doing same thing again. No leaks charge is full. This is not a consistent problem. Sometimes AC works good as new. Help before I start replacing stuff.

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  • Rick Williams Jul 20, 2008

    I fixed it! I went under the dash and switched the vacuum lines around. I took the one for the defrost and put it on the vents. It now works great. I think maybe a relay or vacuum switch went bad. I don't really care because now it works great.

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1 Answer

Check your vacume lines

Posted on Jul 19, 2008

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Air not coming out of vents


what your problem is that you have a issue with the vacume system, what i did was removed the bottom panel on the passenger side looked up and you will see a bunch of wires, look for a black box (should be right above your head by time you squeeze in there and it has a yellow/amberish type of color you will see that you can remove this its a rubber piece cut the pink tube on the side about 2 inches away from the plug assembly, and slide it into the blue tube this will bypass all controlls and shoot the air out of the front vents, you WILL NOT beable to set it to defrost max/normal or htr (mainly which vent flaps are where) this has worked formonths and the a/c acts as if its on normal mode to use the heat just slide the switch :) until you can test all the other equip this will keep you cool or warm

Jun 26, 2008 | 1994 Buick LeSabre

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