Is there a chance that my motor is getting "TIRED" It just seems like its not blowing all that hard anymore even on the high setting.

Has oneone replaced their motor for this reason ??

 

if its not blowin hard then its not gettin enough current or elecical components are becoming worn

 

You phrased that... different, cashoit. Im not going to say wrong, because I cant say for sure if you're just miswording it.

The blower motor draws current. It is not "supplied" current. So for it to "not get enough" current would imply that it is supplied, in this case is not correct. If it were a current issue, you would have high resistance somewhere, wires would get hot, possibly short. Thats why there is a fuse.

Matty, yes, its possible. I dont know if our motors are brushed magnetic or brushless. If the former, the commutator or brushes could be worn, not getting a good connection. If its brushless, I think the coils can go bad.

Also, some blades could have come off the fan itself, which could cause it not to push as much air.

 

The bushings that serve as bearings in the motor could have lost their lubrication and causing the motor armature to bind and slow down. Bushings wearing out like that is normal, nothing lasts forever except taxes.

Under the category of "its possible but not very likely", you could have dirt & debris build up in the evaporator core and blocking airflow.

 

I am also having a problem with my blower motor in my 99 maxima. Sometimes when I start the car it will blow, sometimes not. I give it a little kick under the glove compartment and it will start blowing. I have found a TYC blower motor on Amazon.com for approx. $45.00 which will arrive in a few days and also includes the fan. Better yet, no shipping charge. I've never removed or installed one, but reading the forum it is susposed to be fairly easy. Hope so! If anyone has any newbie tips for doing this it would be appreciated.

 

It's not that hard to do. You take the glove box out and let rest on the floor. The wire harness for the glove box light has maybe 12 inches of slack. Then you unscrew the blower motor and bring it down and out.

However, the squirrel cage (fan blades) may be a little too large and may keep the motor from dropping all the way out.



If this happens, you have 2 options. 1 - cut the metal band that is the bottom edge of the dashboard. 2 - Remove the kick panel and remove the nut that holds the bottom corner of the dashboard down and this will let you pull the dash board out enough so that the fan will drop out. I recommend option 2. Cutting the dashboard will weaken the overall strength and rigidity.

 

Nice pics, and yes, do option two. It takes literally 2 minutes more, and its the proper way to do it.

 

Pardon my ignorance, but you reference to remove the kick panel as part of getting the squirrel cage out. Is the kick panel the part with the speaker on the passenger door and how do you remove it?

 

Im gonna take it out this weekend and do alittle inspection. Not sure if its up to par or not. Im used to my 2007 Silverado with the super interior fans.

As far as your guys a/c, how does it perform ? I just finally got all my a/c issues fixed and its working up to par. I have auto climate control and I think the thermometer is off a bit. I put it on 65 this morning and it kicks on one fan all the way to work. Its cold but only one fan speed.

thanks guys
-matt

 

No. The kick panel is the one in front of the door by your feet. The one on the door is called a trim panel.

 

"kicks on one fan" ??? I don't understand what you mean with this, but "only one fan speed" does. I'm going to assume that you pressed the fan speed button and it didn't change the fan speed. But did the little "fan blade" indicators change?

There are 2 things that control the fan speed. The first one is the controls in the dash, the auto amplifier as Nissan calls it. The second is the fan control amplifier down by the blower motor motor itself.

http://boredmder.com/FSMs/Nissan/Maxima/1996/HA.pdf
There is a self diagnostic in the FSM, starting on page 70 in the 1996 manual.

If you want to try it with a volt meter, take a voltage reading on the fan control amplifier. The connector for the Fan Control Amplifier is a 4 pin connector, but only has 3 wires in it.

Pin 1 - blue/white stripe - 12 volts coming through the blower motor windings.
Pin 2 - blue/yellow stripe - control leg of the fan amplifier from the auto amplifier.
Pin 3 - black wire - chassis ground.

the wire in pin 2 is a thinner wire than the others and this is the one you want to measure the voltage at.

Fan speed setting & corresponding voltage on pin 2:
off - 0.01
1 - 2.6
2 - 2.9
3 - 3.2
4 - 8.2

Fan speed setting & corresponding voltage on pin 1
off - 11.9
1 - 7.6
2 - 4.1
3 - 1.3
4 - 0.45

If you have the climate control OFF button pressed in, then pin 2 should read zero volts (or close to it) and the blower motor should be off. If you have zero volts and the fan is running, the amplifier is bad. But if the voltage on pin 2 does not vary, then the problem is probably the dash controls.

 

Thanks Dennis, I couldn't have done it without your pics and advice. Only "interesting" part was contourting my 6' 4" frame under the dash to do the work. You and the other members truly provide an appreciated & informative service to the Maxima community.

 

I wonder if the voltage regualtor for the fan is on the fritz. I've heard of issues with these parts.

evo

 

As someone new to Nissan, a big part of fixing these cars is learning the Nissan name for the parts. Very few of us speak Nissanese. A lot of us have learned it to some half a$$ extent.

The closest thing to a "voltage regualtor for the fan" is what Nissan calls the "fan control amplifier". But its not a voltage regulator at all, it's more like a dimmer switch for a light. And yes, this part is known to blow its little transistorized brains out.

Did you know that Nissan does not put cruise control in any of its cars? In its place, they put in ASCD or "Automatic Speed Control Device". Happy Nissaning.

 

matty, i am on the same boat. mine keeps blowing the blower fuse. i am looking for prices and so far rockauto has it the cheapest. taking it out is pretty self explanatory once you drop the glove box.

 

Here's my dilema on my 98..out of the 4 fan settings mine only works on the highest settings. Any suggestions?

 

Blower motor resistor.

 

Location, details, pixs?

 

Look up under the passenger side dash, you'll see a plug that's readily accessible, disconnect that plug and take out the 2 screws holding it in (you'll see what I mean if you look up under there), that's your blower motor resistor. Very easy job, installation is reverse of removal of course.