Question about 1994 Buick LeSabre
My 1994 buick lesare vents don't want to work all the time. i turn vent on it just comes out of defrost. i can be going down road and it will start coming out of the vents. the ac works same way. it works for short time then cuts off and only come out of defrost agan. what can i do to fix this. need the
AC. when it does work it is very cold. 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.
Initially sounds like an intermittent/loose connection, electrical. This of course would include/require check of wiring, switches, connector and relays. The compressor relay would be at the firewall normally near the brake master.
Additionally, the actuators may likewise require checking up. They would normally be behind the glove compartment. The indicator would be, blower/fan motor running but no air on the vents. The actuators are triggered by the vacuum tanks. The tanks are likewise in the engine bay, at the firewall and close to the brake master. The tank would have two (2) lines, one from the engine, the other as earlier stated to the actuators.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
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Posted on Jul 14, 2008
Inside the air box in the interior of the car,there is a door that swings back and forth to direct air flow either to the vents,defrosters,or heat,out the bottom.This door is controlled by a mechanism that is powered by vacuum from the engine.I have seen later models that were little electric motors,but i think your model probably uses a vacuum plunger.Thats the area to look for a problem,if all the underhood vacuum lines check out.
Posted on Jul 14, 2008
Check under the hood and locate your vacuum lines going in and out of the fire wall, a number of times, vacuum lines can crack and sometimes cracked lines can seal, or leak.
Posted on Jul 09, 2008
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