Hey everyone,
I just went for a ride with my mother in her 2000 maxima, and her A/C fan is making a horrible noise, it sounds like the bearing going out or something.. you dont really notice it on low but on a mid or high fan setting and its aweful.

Anyone else had this issue or know what it is? She'd like to get it fixed asap.

Dave

 

blower motor, use some used parts search engines, or goto a local junk yard, the blower moter from the Altima also fits.
I got a used one shipped with a 90 day warranty for $40
and it is really simple to put in

 

this started about two weeks ago. start up the car, god awful loud "humming" sound coming from area of passenger A pillar. simmers down as the car warms up, but is still audible if i go over a bump for a few seconds, if i make a turn, i hear it for a few seconds. i'm not having any electrical problems...actually, my drivers window goes up and down pretty slowly at times. am i looking at alternator problems. or something else. just got the car in december with 63K on it...01 SE AE 5 speed...i'm in love with it already but this nagging irritant is bugging me. amy assistance is appreciated. thanx

 

see if it goes away when you turn the heat off, if so, it's the bearing in your blower moter, same as above.

 

i will check it tonight. thnx for the advice

 

there is a TSB for this (you dont need to replace anything)..lemme find it

 

here you go

http://maxima.theowensfamily.com/tsb/NTB99-071b.pdf

 

hmm. i had this problem when the fan speed was on 2-4. i took the blower motor out, sprayed some wd-40 in it, and runs perfectly fine now.
not sure what ur sound is, but on mine, it sounded like it was knocking on something like it was out of place so perhaps it was the case. maybe that TSB will work, but what i did worked for me

 

The noise is coming from the front of the car but I can't tel what it is ...

http://www.flickr.com/photos/freeload101/4799602227/

 

I replaced my blower motor for 25 bucks off ebay. As noted in another thread the 4th gen motor is basically identical and is a lot cheaper.

 

thats the electric engine mounts.

 

I thought the mounts kept making noise when you shut the car off. That could be a radiator fan, too.

 

he did shut the car off, thats why its making noise.

 

Maybe fan but engine mounts dont do anything untill there is a load right ??

also what can I google to learn more about "electric engine mounts" google of that I dont end up with much. I am a 1337 computer/security guy and i am trying to learn more about cars.


new video his is after turnkey to ON position.

http://www.flickr.com/photos/freeload101/4802271330/

 

The engine mounts do make a noise when you first start the car and after the car is shut off. Basically the electronic mounts have automatic dampening based on conditions.

This video has a hideous sound with it, it almost sounds like a bad starter, but did you attempt to start the car?

The engine mounts have a small electronic hum, like a servo motor.

 

if its making noise before you turn on the engine and after you shut off, its the electric engine mounts.

 

Cool ill try and read up on it! Thank you so much. If you guys need anything let me know rmccurdyDOTcom ! ( hopefully it wont cost too much .. I need new hood and bumper and tiebar bent

 

We are having a similar issue in our 2000 Maxima we just got. It sounds fine until the A/C is cut on, and then it gets progressively louder. It doesn't sound so much like a bearing squeak as it just seems like that fan is being overworked. Today I noticed that the second fan (right side under the fresh air scoop) wasn't coming on. We drove the car around for a while and got it good and hot, but when we stopped and checked it, the second fan still wasn't coming on. Could it just be the engine temp. sensor or maybe a sensor to that second fan gone bad and now the other fan is trying to do double duty?

 

There is only one signal that goes to both fans; so if one fans runs, the other one should be running too.. Your sensor theory is not correct in this case.

With the car shut off, grab the fan blade and wiggle it. It should not wiggle or wobble at all. If it has any wiggle, it will be very noisey when it spins and will will self-destruct internally and stop spinning. You can check some fuses, but if they are blown, the motor went bad and took the fuses with it. If the fuses are good and the fan doesn't work, you still need a new motor. The fuses are under the hood by the battery. The cover on the fuses has the layout (positions) and calls them RAD FAN 1 and RAD FAN 2. They are 40 amp.

Here are some pictures of a defective fan motor:
http://forums.maxima.org/5th-generat...ed-8-pics.html

 

Ok, so if that second fan is bad, is that why the other fan is getting so noinsy when the A/C comes on, or is there another fan just for the A/C somewhere under there I haven't seen yet?

 

Easy fix:

 

There are only the 2 radiator fans. (BTY, these are 2 speed motors.)

When you turn on the A/C, it also turns on the radiator fans, even if you just started the car and the engine is cold. When the engine coolant temperature reaches approx 210 degrees, the fans are told to run at high speed.

Your other fan motor is noisey because it is bad, the bearings inside are shot and the fan blade is wobbling. This wobbling makes the noise.

 

I went out and wiggled the blades this morning and they felt pretty tight to me actually. Could it be a bad relay not making one of the fans come on possibly? Which fan is "1" and which is "2" ( in relation to passenger and driver side)? It's also showing a SES light but I'm not sure what it's for yet. I tried a method I read online to obtain the code by pressing the gas pedal in in a certain succession, but I can't get it to flash. I'm gonna take it by Vatozone later today and get them to read the codes for me. It probably does need new fans, but I want to try a few simpler solutions first and also make sure I don't have multiple issues going on at the same time.

On a side note, my cousin's '03 Maxima is having fan issues as well. His fans try and come on for a second, but immediately kick right back off. This has caused some overheating issues and now his radiatiator is leaking too. He later found that if he has the A/C on, both fans will stay running constant. That sounds like a bad engine coolant temp sensor doesn't it? The only kicker is that his SES light isn't on and his car is throwing NO codes despite these issues.

Ok, I replaced both of the fan relays and BINGO, they both work now and the fan that was running all by itself has now quieted down to normal. I would say our problem is fixed, for now at least. My cousin's issues with his '03, however, still remains unsolved.

 

Not enough information to give an accurate answer. Most likely the radiator has been leaking longer that he thinks. With a low coolant level, the engine temp sensor is not immersed in liquid and as such, does not do a good job of sensing air temperature. Get the radiator replaced and make sure that all the air is burped out of the engine and see what happens with the fans.

NO. As I said in my other post, Nissan designed the car so that when you turn on the A/C, the radiator fans come on.

Radiator cooling fans do not cause a SES light.

 

Well that's all the info I could gather by inspecting his car:

1) The radiator is bubbling out of the top.

2) The fans are only kicking on for a second by themselves, then cutting right back off.

3) His engine bay feels VERY hot and he's having intake heat soak issues, yet the temp gauge never shows the motor getting hot.

He is ordering a new radiator today. Do you think he needs to go ahead and swap out the thermo in case that's what causes all this, or possibly the coolant temp sensor?

 

OK. The radiator is leaking and the car is low on coolant. The temperature sensors do not work properly if they are not immersed in liquid.

I doubt if you need to replace the thermostat, 99% of the time it is ok. The sensor units rarely go bad.

I would highly recommend that if the car is being driven with the radiator leaking, fill the radiator and overflow container every day. Do this when the engine is cold, never take the radiator cap off when the engine is hot.