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A/C Fan Making Noise

WaarrEagle

By WaarrEagle,
in The Garage

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WaarrEagle NPORA Newbie

WaarrEagle

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The A/C fan is making noise on my 01 Pathfinder. It started months ago but it would only make a noise when I was hard on the brakes. Now its a constant sound. It is not related to the compressor. It gets louder when going from fan speed 1 to 2. The car has auto climate control. Any suggestions as to how to fix it? Its rather annoying.

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hardwaretoad NPORA Old-Timer

hardwaretoad

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Not sure about the brake connection, and what possible effect that would have on your A/C-heater fan, but if your's is like most Pathy's and H/B trucks, it sounds like you have leaves that have gotten down into your fresh-air ducts from the cowling. When this happens on mine, the higher you put the fan output the louder they are... 'til you grind them up & shoot them out all over your interior that is... :P Maybe braking allows them to slide in the ducting until they contact the edge of your fan blades ? Anybody else hazard a guess ? :confused:

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WaarrEagle
NPORA Newbie

WaarrEagle

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I bet you are right about the leaf thing. The car is parked outside and it constantly has leaves/pine straw building up where the a/c air intake is. Where do these leaves build up? I replaced the in-cabin microfilter a while back - is the fan assembly in there?

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hardwaretoad NPORA Old-Timer

hardwaretoad

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in-cabin microfilter

 

My, aren't we fancy ? :lol: I think mine's located next to my hypo-allergenic discombobulator interflow unit... Seriously, I've no idea as to where in the line between outside vent to your heater-A/C blower the microfilter is. Sorry I can't help you there. The blower is down under your dash against the firewall, I would guess, just like they've been mounting them forever. Now that I think about it, I've got a couple bugging me, too...... sssh

 

Edit: "in-cabin microfilter" ~ I guess that tells me where it is... Evidently it's the last line of defense for all that nasty mobile real estate that everybody finds in their rig ~ me included ~ but that's Az. for ya... besides, I've got an '87, we don't need no stinkin' microfilters ! :P

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