Blower motor...but not!!

[vliou]

Hey Guys,

So I get this very high pitch squeaky sound from inside the cabin. It goes away when I turn off the fan, and comes back when the fan is on. I could have swore it was the blower motor, so I replaced it...SAME problem!!

The problem does not go away if it's AC or ECON, and i'm sure it's from the front passenger footwell...any ideas?

No mechanic seems to know...

[bmlawless]

Does it do it regardless of which vent you are blowing through? Does the pitch or volume change with the speed of the fan?

[vliou]

Not sure about the vent, but it has to be at a very low speed...

[gwhunt23]

This is a known issue with the hvac systems in QX4s and I suppose Pathfinders as well. There is a TSB with it floating around somewhere...

[gwhunt23]

Turns out that all the blower motors make the noise which I believe you are describing. However, there is a new sound-proof-like blower motor cover you can try:

"If a customer indicates that a light ticking or humming noise can be heard coming from the blower motor of anapplied vehicle when the motor is run at low fan speeds (speed 1 or 2), a new, noise reducing blower motorcover is available (see Figure 1). The noise, if it occurs, may be very slight and, at times, difficult to hear."

See TSB here for more info: http://www.gwcustom.com/mirror/ITB99-050b.pdf

[bmlawless]

Drat! he beat me to it. I had a link and everything.

http://x.infinitihelp.com/foru...d=709

If a customer indicates that a light ticking or humming noise can be heard coming from the blower motor of an applied vehicle when the motor is run at low fan speeds (speed 1 or 2), a new, noise reducing blower motor cover is available.

[vliou]

That blower motor cover is such a joke, stupid plastic with stupid foam

have that already...any other ideas peeps?

[QXforever]

My fan does the same thing, there is a slight ticking when it is on a lower speed. Thanks for the ITB links.

[vliou]

I think i'm going to get an aftermarket blower motor then, this is just retarded.

It's more of a high pitched grinding sound for me...sounds like a bee...GAK!