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Buick LeSabre, Heating / Cooling
May 13, 2009 (7:42 pm)
I recently purchased a 1995 Buick Lesabre Limited with 150k miles on it and an automatic climate control unit. The air will not blow at all on any setting, but the control unit in the car works. A friend said that there appears to be no electricity going to the blower motor(He used an electrical meter) when I changed the tempature settings in the car. He said it could be the climate control unit in the car or a fuse but I do not have the fuse panel cover so I do not know where the fuse is located. I would greatly appreciate any advice and advice about where to find a fuse panel cover or diagram.
#54 of 278 Re: No air at all [rayslesabre]
May 14, 2009 (4:34 am)
If it's automatic fan speed control or manual but has the digital readout, then your problem most likely is the blower control module.
The check is to take the leads from the blower motor and apply direct battery power through a fuse--please use a fuse-- and see if the motor works. They do die.
Then follow the leads from the blower motor up to the left to the top of the channel that the air goes through from the blower. On top of this boxy channel is the end of an electronic power transistor that controls the blower speed. The circuit board part sticks down into the air stream inside the box for cooling.
You can access this by removing two screws that hold the Relay Center to the firewall above it. The wires to the Relay Center have enough give to move it up some and allows access to the screws holding the blower control module.
You can buy modules at rockauto.com, gmpartsdirect.com, and other parts stores. You also can use recycled from wrecked cars. Just check the parts numbers. Or search on car-parts.com; you'll see the interchangeable ones from other cars.
#55 of 278 Buick blowermotor
May 23, 2009 (10:47 am)
I think I have the same problem with my blower motor. The air coming from my AC is cool, and the defrost works when I am driving because enough air comes through the vents, but the blower started working intermittently some months ago. Sometimes it would come on after I had driven a while, and then I noticed I could hit a bump and the blower would come on, sometimes. Then I found that closing the passenger door would start the blower, and this worked for a while. Yesterday, I noticed that the fan would start weakly and then gradually build in strenght, but then it began weakening and then quit. Bumps and slamming doors do not seem to be able to revive it now. I have priced blowers, but someone said it may not be the blower. It might be a loose wire or a sensor. I don't want to buy something I don't need. What do you think? Do I need a blower, a sensor, or simply some wires reattached?
#56 of 278 Re: Buick blowermotor [elainee]
May 23, 2009 (11:10 am)
If yours is 92-99 leSabre, then your blwoer motor is under the hood on the firewall between the motor and the passenger comartment.
You can test it by using a FUSED wire from the battery along with the ground wire and disconnecting the power to the blower and substituting the power leads from your battery. If it runs fine then, your problem is the blower motor control module or resistor pack or a connection.
Most likely it's the blower motor has worn out. There are 5 screws holding it, more or less, and it comes out toward the motor and can be wiggled out. Some people push the car forward in park and block the rear wheels which twists the motor slightly forward leaving a little more room.
Replacement motors for those years are relatively cheap at various stores or rockauto.com.
#57 of 278 Re: Buick blowermotor [imidazol97]
May 23, 2009 (12:26 pm)
My car is a 2003. Where is the blower in that model?
#58 of 278 Re: Buick blowermotor [elainee]
May 23, 2009 (1:35 pm)
It's under the dash inside the car. Take off the hush panel above the passenger's feet.
The motor end of the fan is down. The squirrel cage rotates in a horizontal plane. There is a connector that some people have found had poor or burned contacts. it's the one for the fan that leads to it.
Most like the fan is toast. The brushes inside the fan and commutator wear fast. Poor supplier quality.
Remove the carpet on the firewall by pulling it down toward the seat. You'll need the extra room. REmove three screws from fan holding it in place. Then Wiggle it out.
Replacement should go in similarly.
#59 of 278 2004 Lesabre Ltd: Blower stopped working
May 25, 2009 (6:24 am)
The blower motor on my 2004 Lesabre Ltd stopped working with essentially no warning. The electronic A/C control indicates it is telling the fan at what speed to operate, but no air is coming out.
I have researched to the point that I suspect the blower motor and the blower control module. However, getting to the module requires I move the Dash Integration Module off its mounting bracket. I can't tell how the module is mounted to the bracket, so I don't know how to remove it.
I have removed the blower motor, and observe that it has s three-pronged connector, and that the motor label indicates it expects 14V. Is there a schematic around that could tell me which two prongs are getting the voltage, so I could test the power the connector? I hand-rotate the cage on the blower, and it seems to spin without resistance, but I obviously have no reference of how freely a known-good motor should spin.
I would appreciate any additional advice anyone might have on this issue. It appears I can order an aftermarket blower from eBay for about $60, and a control module for about $90, but if someone has some info that might suggest another course of action would be appropriate, I'd be more than grateful. It appears my aunt and uncle, who have a 2001 Lesabre, spent some $700 getting this same issue fixed at nearly identical mileage (approx 67K)
Thanks in advance
#60 of 278 Re: 2004 Lesabre Ltd: Blower stopped working [soonerdew]
May 25, 2009 (7:22 am)
Did the blower motor stop at once, or did it not work until the car hit a bump which vibrated it so that the commutator and brushes made contact again. There has been a wear problem with the brushes on some cars.
There also is a problem on some, but I believe earlier than your year, where the ground strap from the armature loses contact with the housing. People lengthen that lead to ensure good contact. Some people have taken apart the working end of the motor to inspect the brushes and the contact--if you have electrical knowledge, you may be able to do that. It sounds like you're dedicated to replacing it if you mess it up by disassembling.
A quick check of my 03 service manual shows A and B as the leads for the motor which are black and purple. C which is brown is a flange ground that goes back to the blower control module.
The blower motor controll processor (the name for the blower control module) is held on by a screw at the top of the box. There's nothing else in front of it.
Is your HVAC the dual temp with digital readout?
The manual system may be different.
#61 of 278 Re: 2004 Lesabre Ltd: Blower stopped working [imidazol97]
May 25, 2009 (11:19 am)
I drove the car to work in the morning, on highways, and the fan was working; got in the car that afternoon, and it wasn't. Was in the driveway when I changed a fuse, which was by my observation wasn't blown, but I replaced it anyway. Started car, no fan immediately, then after perhaps 30 seconds, the fan ran. The fan started with the car on two successive restarts, again sitting on the driveway (no bumps), then on a third restart was dead again.
That's led me to pulling the fan out, and trying to get the module out. The control system is the integrated electronic panel with digital display.
#62 of 278 More info re blower problem
May 26, 2009 (10:01 am)
I have discussed my symptoms with a tech from a dealer that formerly sold and serviced Buicks, and he has strongly suggested that I replace the blower motor rather than the control module. He agreed with the likelihood that the motor has developed a "dead spot" similar to that which arises in some starter solenoids. He obviously cannot guarantee that is the problem, but he felt that was a much higher probability than the control module.
I will be looking at an aftermarket blower, because the local GM dealer wants $300 for a replacement. I think not.