Used car this morning and no air coming from the vents. All is switch on and turned the fan right up high and off and on but still nothing. I have checked fuse and that is fine. Does this mean a new fan motor?
HI THIS IS KEV
THE RESISTOR UNIT IS FITTED TO THE BLOWER MOTOR IT SELF I THINK WHICH IS SET BACK BEHIND THE GLOVE BOX.IF YOU REMOVE THE GLOVE BOX YOU WILL SEE IT.
I THINK YOU WILL FIND ITS THE BLOWER MOTOR AS THESE HAVE A PROBLEM WITH THE TRAY AT THE TOP OF THE BLOWER MOTOR SPILTTING AND LETTING WATER IN AND IT SEIZES THE BOTTOM BEARING ON THE MOTOR.
HOPE THIS HELPS. KEV
This sound like the problem I had and still have, the A/C control / resistor pack on the unit has been changed it worked for some time but has now stopped ! to answer a previous question the unit is located behind the glove box compartment open the glove box and undo the screws at the back and side pull the glove box out and the a/c motor is in front of you
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sounds like your fan is either jamned, burnt out or even frozen, you might be lucky and find its just a blown fuse, you'll need to check your fuses box then start investigating if the fan turns freely or not
if you put the air on recirc you might be able to stop cold air blowing in when you are travelling. if you are waiting for a garage to sort out the fault then get a fan powered by the cigarette lighter, air moving over the window should at least keep mist clear even if it doesnt defrost it
If the fan clearly comes on and you can hear it switching speeds. Check your selector switch on where you want the air to come out of and verify its not on the floor or defrost . The only other thing It could be would be that your ducting has somehow become misaligned resulting in a leak. Turn the system on high and feel around under the dash on both passenger and drivers sides...the exaust has to be there somewhere
Sometimes this is caused buy a vacuum problem. It is not opening the door to let your air in at a slow speed. The doors are opening at high speed due to the air pressure from the outside air. Make sure that the fan is runnig by turning your ignition on but not starting the engine. Turn the fan on high and see if you can hear it. If the fan is running then take you car to a mechanic you trust and have them check the vacuum going to the door.
The 1992 was prior to Buick putting cabin air filters in so there is not a possibility it is clogged. So more than likely your blower motor is going bad or your fan control switch is bad. Does this problem occur with heating as well as AC? Does it change if you switch between blowing on floor, face, window(defrost) If it doesnt change based on location of blow and type of air temp then I would start by turning fan on high and placing head (ear ) against dash in center of console area. Have someone turn fan knob from low to high with engine OFF...After goign from low to high and back a few times you can see if the blower motor is responding to signal from switch. Listen for a whine, squeal, rattle, or humm. A whine or Humm would indicate a bad blower motor... Squeal or rattle a bad squirrel cage/fan blower blades. If you hear no noise and no perceivable change in blower speed/noise then its possible your switch is bad. Unfortunately the only way to definitely diagnose either is to pull the switch from dash and use multimeter to test for voltage change and for blower motor to pull dash. There is a digital control unit for your car as well. Although rare sometimes the wires on this can loosen or it can go bad. But since you didnt state teh fan wasnt working at all and you are getting cool air, that woudl be teh last thing to check
the air distribution switch controls the air distribution and the fan, distribution switch in the 0 (straight down position) will be off. Car movement forces air into teh body, but with teh fan off there will be no air when the car stops. Does the fan run when the distribution switch is in any other position? it should respond to the speed settings of the fan switch.
There is a vacuum bottle accumulator that assists the distribution switch, sometimes this gets disconnected and the switch settings don't work.
Do you hear any noises if you turn the distribution knob while the car is running? suction noises, or flaps opening?
If not, then you likely have a vacuum problem (check for a white bottle in left front wheel housing, except convertible -> under the spare wheel, tank should have one or two vacuum lines connected to it (one for convertible). A disconnected or leaky line is the most likely cause.
Possible other causes are faulty air distribution switch; burned out fan motor; inoperative vacuum solenoid motors controlling air distribution flaps.
But check the vacuum accumulator first, if under the spare wheel, the lines are easily dislodged.
wow...here it is spring and no one answered either of you? Is there a large volume of air when fan is on high? Where is it going? Or do you not hear anything from the fan? The 240 has an awesome heater. On high it would heat a small home! If no sound, your blower motor is dead assuming the fuse is good. If you hear the fan blowing, figure out where the air IS going. Note that the only way to turn the dash vents off is with the white Oreo dials. To defrost, only that button should be pressed in and dash vents off. Behind the dash switches there is a maze of short vacuum hoses. Often times, people monkey w/ these and reconnect them incorrectly. Haynes manual or Chilton's have proper diagrams. It could be that the vacuum hose coming from the manifold and entering the firewall is split on the under side and not visible, also.