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Hvac Fan Is Making Noise

bballa

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bballa Enthusiast

bballa

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The HVAC fan in my truck is making noise. It sounds like the fan is hitting some paper or something, there is also a buzz / hum going on. It gets worse as the setting goes up. Anyone know how to get to the fan? It would be nice if i could fix this myself. Any and all help is appreciated.

hubbycap Senior Enthusiast

hubbycap

Posted
Posted
The HVAC fan in my truck is making noise. It sounds like the fan is hitting some paper or something, there is also a buzz / hum going on. It gets worse as the setting goes up. Anyone know how to get to the fan? It would be nice if i could fix this myself. Any and all help is appreciated.

 

Probably leaves through the cowl vent. Not sure on the removal. Post your year/model and someone will chime in.

bballa Enthusiast

bballa

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I must have left the fan on a high setting, 3or 4, last time I drove it because when I started the truck this morning the fan came on making the noises. Could starting the truck with the fan on a high setting cause this condition? It operated fine yesterday. Very quiet.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
I must have left the fan on a high setting, 3or 4, last time I drove it because when I started the truck this morning the fan came on making the noises. Could starting the truck with the fan on a high setting cause this condition? It operated fine yesterday. Very quiet.

 

I don't think that would matter....it's probably leaves or debris just like hubbycap stated. Drop the fan down and check it....ever change your cabin air filters?

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
I must have left the fan on a high setting, 3or 4, last time I drove it because when I started the truck this morning the fan came on making the noises. Could starting the truck with the fan on a high setting cause this condition? It operated fine yesterday. Very quiet.

 

I don't think that would matter....it's probably leaves or debris just like hubbycap stated. Drop the fan down and check it....ever change your cabin air filters?

 

 

Drop that plastic cover down on the passengers side (same as you had to do when you changed your cabin air filters) and it's sitting to the far right. The motor is actually hanging straight down towards the floor if I remember correctly. Take out those screws around it and the entire assembly should drop out of the duct.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
so it is the round plastic cover on the far right? Thanks!

 

That should be it...disconnect the plug and drop it out and see if it's filled up w/ crapola....

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted

I have a similar noise on my 00. Have had it for awhile. Its a high pitched noise. If I cracnk it on 4 or 5 speed for a bit and crank is down to 1-2 it goes away. Its really an annoyance.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
I have a similar noise on my 00. Have had it for awhile. Its a high pitched noise. If I cracnk it on 4 or 5 speed for a bit and crank is down to 1-2 it goes away. Its really an annoyance.

 

If you've got a high pitch noise you're fan motor is most probably the culprit...

bballa Enthusiast

bballa

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I tried to get the fan out but could not figure out how. I took out all the screws I could see and a few I couldn't see and still was unable to get the fan out. The round plastic cover comes out after removing 3 screws. I unplugged the fan (2 plugs) and was able to remove the cover but then I could not see how to proceed. It sounded like such a simple thing to try, drop the fan and clean out the crud. Unfortunately this has not been the case. I need more help. Anyone know how to take out the fan? :thumbs:

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
I tried to get the fan out but could not figure out how. I took out all the screws I could see and a few I couldn't see and still was unable to get the fan out. The round plastic cover comes out after removing 3 screws. I unplugged the fan (2 plugs) and was able to remove the cover but then I could not see how to proceed. It sounded like such a simple thing to try, drop the fan and clean out the crud. Unfortunately this has not been the case. I need more help. Anyone know how to take out the fan? :thumbs:

 

Rich,

Looking at my service manual it gives the following instructions: Pull the retaining tab down while turning the blower motor counter clockwise in order to disengage the blower motor from the heater/ventilation module.

Hopefully that will help you get it out.

John

j.roffel Senior Enthusiast

j.roffel

Posted
Posted

In the winter if I leave the fan on high when I get out for the night, it squeals really loud when I start her up in the morning. I just have to turn it off for a few seconds then crank it back up and it's fine, sometimes have to do it twice...

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