An expert who has achieved level 3 by getting 1000 points
An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.
An expert that got 20 achievements.
An expert that got 10 achievements.
Re: Very low air flow through vents despite the fan...
It is very likely that the Air conditioner evaporator core is restricted due to leaves or some other object may be blocking air flow like a plastic bag, does it do this on both outside air and recirculation setting?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Do you have heat? Does the fan turn on? are you getting air from the defroster vents close to the windshield? If you have heat make sure the defrost control is working. I'd open the outside air vent and turn the blower on high speed. If there is no heat, the heater control valve is not working. Double check the radiator fluid tank, make sure you have enough fluid (antifreeze) Low fluid levels can reduce the hot water flow to the heater coil inside the car. If there
is no air flow through the defroster vents you may have a problem with the fan control, or the fan motor. Good luck.
theres a small narrow plastic line from engine compartment going through fire wall witch supplies the actuators it gets hard over time and breaks or cracks when that happens the defrost vent will stay on . when this happens not enough air vauum getting to vent units.
Hello and welcome to FIxYa!
You may want to check on the vents for it can be closed half way. If the vents are good then the problem will surely be on the blower itself. It can be worn out that's why the blower motor blows weak. Once replaced I believe you'll be good.
Hope this helps and thank you for using FixYa! Have a good one!
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
it's either a fuse or it's a bad blower motor, it could be a bad blower
motor resistor but usually you'll get either high or low only, so if
you have nothing on any speed, high low etc, and all the fuses are ok
chances are it's your blower motor.