When ac ,or heater in use blower fan not blowing as much air as it should be,where is hepa filter located?

Have you changed your cabin air filter? Check your manual

Buick LeSabre Heater - RepairPal

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Buick LeSabre Heater blows only cool air...even w/ defroster on. This is a ... Heater fandoesn't come on . ... The blower works but there is no heat coming out.

Blower Motor Problems ' Auto Repair Help - YouTube

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https://www.youtube.com/watch?v=2vmfxYg8LoY
Sep 27, 2009 - Uploaded by mgittelman
The blower motor is a common heater/AC repair within the skill level of ... However if the power wire is a single light purple wire and the ... for blower motor and fuel and relay good but no powercoming on both any ideas? ... my o5 seira, when i start the engine with the air switch on it blows my blower fan ...

Car Air Not Blowing, Heat & Air "How to" Test Testing ...

? 6:22
https://www.youtube.com/watch?v=hgar6Q1lV6A
Apr 5, 2013 - Uploaded by Fixbook
Here I show how to determine the problem if your air, or blowermotor is not ... Click here to check out the the "Car Runs on 2 cylinders" series: ... How to Fix Over-Heating engine & No Heat in car - Buick (2000 yr) Park Ave . ... Car fan / AC only works on high - Replacing the Blower Resistor - Duration: 4:24.

Buick Park Avenue Questions - NO HEAT!!! - CarGurus

I think you have a "variable speed resistor" problem, it's overheating. It's an electronic device usually located near or attached to the AC motor blower that controls the fan speed. This is a common problem with aging AC blowers with electronic controls.

There is a possibility that the fan may have came off The motor shaft/spindle which has to rotate to blow the air to the vents

http://www.autozone.com/autozone/parts/Duralast-A-C-Heater-Blower-Motor-Resistor/2001-Pontiac-Aztek/_/N-jev6lZ91tag?itemIdentifier=593781_0_4227_ Here's what it looks like,it's by the blower motor.

Hello! Coil of Heater Relay is supplied through Fuse "IG1 2" (10A)...Located in the Drivers Side Box...Contacts of Relay are supplied through "Heater Fuse (50A)...Located in Engine Relay Box...Blower Motor has a 2 wire connector with wire colors: Black/Yellow (Pin 2)...And White/Blue (Pin 1)...Pin 1=Ground and Pin 2=Battery when Relay pulls and contacts close...
The Blower Resistor Pack (Which fails often) controls the fan speed...BUT, there is a fuse inside the assembly...If it blows = No Fan...Located on the top of the heater/AC box and can be accessed through the Glove Compartment...Guru...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

You didn't specify what type of vehicle.
If you have very poor air flow out the vents, later model vehicles have a hepa filter or cabin filter in line form the blower motor to the vents. It can be plugged quite easily and drastically cuts down the air blown into the vehicle. Check to see if they are plugged. Secondly, Check your coolant level in the rad and reservoir. If the windows fog up when cold and air flow is good it could indicate a leaking heater core. Check the passenger side floor for signs of coolant again I don't know the type of vehicle, some heater cores are located at the firewall under the hood.

verify the fuse first!! the blower is located behind glove box, see it under it and only need to remove 4 phillips screws!

Your heater blower fan unit is in need of replacement.
It's a difficult job so take it to a service center.

Check your fuses.If you have a test light, unplug the blower motor, start the car, turn the fan on, if you have power to the blower plug, the blower motor is bad. If no power, if it's not a fuse, check the blower motor resistor. Should be mounted right next to the blower motor. It is inserted into the evaporator box