Make sure refrigerant is fully charged. Does it have dual climate control? Perhaps passenger side sensor is not working properly
Under the hood in front of the transmission dip stick is a vacuum line. If it is disconnected or split it will make the air vents not work. If that's not it check your fuses.
your blend door which cost about $1000-1500
== == There are three electronic actuators under the dash: one is for the defroser, one is for the bank of four passenger vents and one ( this is you) sends air to the two driver side vents, the two mid-dash vents and the two rear vents. Either this actuator is faulty, or there's a problem with the electrical delivery system; mainly, the whole climate control panel in your dash (dealer cost: about $700.00).
I just fixed a similar problem on my 95 LeSabre, got info from this website. http://www.imcool.com/articles/aircondition/fix_vacuum_line.htm
The Avalanche has dual controls for the air conditioning system. One control operates the driver side ac vents, and the other control operates the passenger side vents.
The vacuum supply line from the engine is disconnected or broken. When the vacuum supply is cut off the system defaults to the defrost mode.
Take off the top dash cover.. There are some screws by the defrost vents, take off the tri piece to find those. And then underneath there will have about five more. Look up where the gear shift is to find these ones. Once you remove the dash cover, you will see a red box on the passenger side.
There is a conduit with a fastener at the end. When I obtained my 2005 Buick LeSabre my rear air vents seemed to blow less than I had expected. After further inspection, I discovered that the conduit was not attached to the vent stack. So I played with it until I got it to slide into the vent stack and it seems to work as I would have expected at present.
that is the default mode for the hvac, check vacuum line on passenger side of motor, comes for the strut area over to motor, main vacuum hose for system, mine had come loose
I don't directly know about a '92 Estate Wagon, but I have a '95 LeSabre, and you have to start by carefully prying up on the vents with a small screw driver to pop them out. Then take out the screws that you just uncovered. This should allow you to remove the black plastic trim piece that spans the whole dashboard. After that, you can get to the screws holding the radio in and just pull it out and unplug it. But like I said, I have a 95 LeSabre, not a 92 Estate, so it could be different, but I hope this helps a little!
The 1984 Buick uses vacuum lines to change air flow from defroster to ac vents. Check the entire vacuum system for leaks.
To change the CD player you need to disassemble the dash. First remove the 4 vents. There will be screws there. Also remove the woodgrain trim, there's screws there too. remove them and then pull the black dash piece out.
i have seen this problem on Buick cars , the air coming out of the left two vents was much warmer than the right vents. turned out that the ac system was low on freon,. It does this because by the time the air gets to the left vents it has warmed. Check the low side pressure on the system. Its probably below 30 psi. Add freon until the low side pressure is about 40 psi, idling. Its an ez fix Please respond and let me know if this cures the problem.
Check the vacuum line that comes from the engine is connected to the firewall. Mine had become disconnected and caused some strange operation. All the controls operate on vacuum so hope this helps.
first you snap off the wood trim from the dash then you take 3 screws out, one at the bottom left of the trunk release the other at bottom of passenger airbag and the other one is located to the bottom right of the passenger airbag. After that pop out the 4 air vents, inside there is one skrew in each of the vents slot tak those out too. Put the Buick in the lowest gear probbly in first gear for a 95.Then you tilt the sterring wheel down and pull outwards on the dash You will see the factory stereo has some skrews take those out and your done........I suggest you go to wal-mart and but the stock connectors so you wont have to cut any wires. It only cost like 10 bucks.
The climate control is not operating for the passenger side. Check to insure the physical controls work, and the diverter vents are opening to let the cool air to the passenger side.
There may be something blocking the deflectors from sending air up there.
This happened to mine every year for 4 years. First few times it was a hose to the compressor, last time it was the actual compressor that had to be replaced...bought it on Ebay for around $300
If the heat selector will not switch from defrost to the dash or foot vents on a 1992 Buick, it is possible that the cable connected to the vent is broken. When the selector is moved from defrost, a cable opens the other selected vents on the heater.
prior out with a flat screw driver
Have the cabin air filter changed.
Do the Drivers side and Passenger side have separate "Heat/Cold" controls? If "No" then I'm at a lose to explain this one. If "Yes" then it may be that the controls are malfunctioning. It may be that the control switch/rheostat may be malfunctioning and need to be replaced or that the thermistor (the electronic device used to detect the temperature) on one side or the other is malfunctioning. etc. etc........... TommyTrouble I have a 1995 Buick Regal Custom Sedan, and just today I fixed a similar problem with my heater. Hot air would come out the passenger side vents, and cold air would come out the driver side vents and the rear seat vents under the seats. I found the problem was a connection to the electronically controlled ventilation door was not connected. If this is the case, you may want to check those. The heater core will not heat cold air that is moving at 60 miles per hour, which can cause the cabin to become quite cold. ! -Paul Musgrave
your driver/ passenger dual zone temperature switch is bad. buy a new one and replace it. $35 at any auto junk yard. easy fix.
Could the heater door actuator be bad? What is the cost to replace? This Grand Prix has a dual-zone climate control and when the AC is on, the passenger side vents often change to heat when the control is still on cold.