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Scott R Profile
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Date Registered: 04-2012
TOTAL POSTS: 16
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Blower fan noise on T31


Hello all
I have a T31 Ti which makes an awful droaning noise when the heater/AC fan is on. Often gets triggered by turning the fan up to a higher speed, but once its started it sounds the same until the fan is switched off ( when it stops).

I recently had the car serviced at Nissan and I meantioned that it sounded like the fan bearing was toast, to which the guy replied " there is no bearing in the fan". WT?

Anyway, when I got the car back they said that they had cleaned out some leaves when they replaced the pollen filter so all should be good. As i drove it away the noise started immediately again.

Noise spunds like it is coming from dash area in front of driver, but from reading the lower fan post on this forum it sounds like the lower is near the glovebox?

Anyway, I have taken the glovebox out ( thanks to great explanation from this forum), but have not found anywhere on the forum how to remove the blower for a T31 - behind the glovebox looks a lot different to the pictures posted for the T30.

I would greatly appreciate any advice from anyone on suggestions on what the noise problem could be and also if its the blower then how to remove the blower on a T31.

Thanks in advance, regards Scott
17/Apr/2012, 12:18 pm Link to this post Send Private Message Blog
 
Scott R Profile
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Date Registered: 04-2012
TOTAL POSTS: 16
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Re: Blower fan noise on T31


Bump.

I still have the glovebox out but am pretty stuck at this point unless someone has some idea how to access the blower fan in the T31.

If not, I will put the glovebox back in and take the car to another Nissan dealer to see if they can fix it.

Any advice would be much appreciated...
19/Apr/2012, 10:16 am Link to this post Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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Re: Blower fan noise on T31


Hi Scott,

Below are the instructions on how to remove the bloower fan assembly from the air-con unit and also how to check the FAN amplifier if the FAN speed starts to play-up.

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You will note that there are no screws holding the blower fan motor in place, so it is a matter of rotating it and pulling it out.

Try and use WD40 on the blower fan and see if that fixes the noise and it would also help us if you can take photos of the blower fan motor when you take it out and tell us if it has a bearing in it or not.

---

19/Apr/2012, 10:54 am Link to this post Send Private Message MSN Blog
 
Scott R Profile
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Date Registered: 04-2012
TOTAL POSTS: 16
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Re: Blower fan noise on T31


Thanks Jalalski. My wife has the car at the moment so i cant check it out but from memory the area exposed now the glovebox is out doesn't really look like the diagram. But will check it when i can.
Thanks again, will send photos as suggested if/when i can get the blower out.

Any ideas why the noise might be coming from the dash on the drivers side? I also noticed the noise does not start immediately, but once it does start, it sounds the same volume as you turn the fan speed up or down, just becomes a bit higher pitched sound ( not lower pitched as you might expect) as the fan approaches its lowest speed setting and eventually stops a couple of seconds after the fan is switched off.

Very strange....
19/Apr/2012, 3:33 pm Link to this post Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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Re:


The noise is coming from the driver's side because I believe the blower fan assembly is facing the driver's side foot-well and not the passenger side emoticon

You can put the glovebox back because you need to get to the blower fan from other side by removing the side plastic panel that covers the ducting of the centre console.

---

19/Apr/2012, 3:40 pm Link to this post Send Private Message MSN Blog
 
cooch t31 Profile
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Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re:


There could be something caught in the blower motor also like a leaf or other debris (has happened before). Might be something that had fallen in one of the top vents. Do you have kids?
Removal of the motor should reveal all.

---
Tony X-891c

HERE is my D22 Navara
HERE is my old 2008 T31, ST Series1

20/Apr/2012, 6:49 am Link to this post Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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Re:


I am suspecting that as well Tony, because the blower motor is attached sideways to the air-con unit, I reckon the top vents near the bonnet can let a small piece of debris through and it might cause the blower motor to make these noises.

---

20/Apr/2012, 7:33 am Link to this post Send Private Message MSN Blog
 
Scott R Profile
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Date Registered: 04-2012
TOTAL POSTS: 16
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Re: Blower fan noise on T31


ok i have the blower fan out now.
No signs of any debris, leaves or children's deposits so nothing obvious causing the noise.

I havent separated the fan from the motor as the instructions in the image you uploaded said not to replace individual components as the balance is adjusted when fan and motor are assembled.

There does appear to be a little bit of play between the fan and motor, which could account for the fact that the noise doesnt start immediately the fan is switched on, but once it starts it stays until switched off. Although one would think if it was some kind of harmonic resonance vibration that the vibration would cease when the fan speed was changed faster or slower( which it doesn't).

There is no easy way of getting some wd40 into the bearing without pulling the fan off. So maybe i will try just reassembling now and see how that goes. Go knows what a blower fan assembly would be worth.

Have taken some shots of the blower fan assembly but not sure how to upload. Will try to do that later.
21/Apr/2012, 1:46 pm Link to this post Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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Re:


Good stuff Scott,

If there is a part number printed on the blower fan note that down and call a couple of wreckers for a price.

You can email me the photos to the admin mailbox and I will help you upload them this time.

You can also refer to the Photos Posting guide section for more details.

---

21/Apr/2012, 2:15 pm Link to this post Send Private Message MSN Blog
 
Scott R Profile
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Date Registered: 04-2012
TOTAL POSTS: 16
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Re: Blower fan noise on T31


Update: when i puT the blower back again the noise was worse!!!

So i took it out again and figuring i had nothing to lose i pulled the fan off the motor assembly and gave the bearing area a spray with WD40 as suggested by Jalalski. Also tightened the fan retaining nut a bit more than it was. Also stuck my hand up into the blower fan housing to see if anything was sticking out and perhaps rubbing on the fan. Didnt appear to be but gave the foam there a good prod to push it away from the fan.

Anyhow, once i reinstalled the fan and switched her on the noise seems to be gone! Yippee!

Fingers crossed it doesn't return.

Thanks for your help again Jalalski. I sent you a photo of the blower fan unit.

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Scott

Last edited by jalalski, 21/Apr/2012, 11:27 pm
21/Apr/2012, 9:22 pm Link to this post Send Private Message Blog
 


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