Noisy a/c vent? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

StraightOuttaCanadaEh · 03-17-2017, 12:13 PM

Noticed yesterday how annoying the din coming from the passenger footwell is when I have the A/C on. Doesn't matter where I direct the airflow to, that's where the sound comes from. Is the A/C pump or whatever located behind the dash there? If you ever had a very old TV that would produce this annoying constant tzzzzzzz sound, then you know what this sounds like. It's like white noise. I have to play music, otherwise it's drilling into my brain. Wonder why I never noticed it before. Anyone else have this?

humfrz · 03-17-2017, 12:21 PM

Sounds like a loose vent flap.

I suggest you wiggle things around there to see if you can make it stop.

Bubba says to push on things around there, then when you find what is buzzing, stuff a piece of dry sponge behind the housing that holds the vent.

humfrz

murdoc · 03-17-2017, 12:31 PM

I always assumed it was the blower motor bearings or fan making a noise.

I fixed it with a catback.

humfrz · 03-17-2017, 01:26 PM

Quote:

Originally Posted by murdoc

I always assumed it was the blower motor bearings or fan making a noise.

I fixed it with a catback.

huh!!!!

A turbo would have fixed it even better .......

humfrz

Tcoat · 03-17-2017, 02:39 PM

Quote:

Originally Posted by murdoc

I always assumed it was the blower motor bearings or fan making a noise.

I fixed it with a catback.

I believe it is the fan as well. I also use the catback/overly loud music correction method.

StraightOuttaCanadaEh · 03-17-2017, 03:57 PM

Well a catback is on its way so maybe that'll help lol

Ultramaroon · 03-17-2017, 05:56 PM

Quote:

Originally Posted by StraightOuttaCanadaEh

Noticed yesterday how annoying the din coming from the passenger footwell is when I have the A/C on. Doesn't matter where I direct the airflow to, that's where the sound comes from. Is the A/C pump or whatever located behind the dash there? If you ever had a very old TV that would produce this annoying constant tzzzzzzz sound, then you know what this sounds like. It's like white noise. I have to play music, otherwise it's drilling into my brain. Wonder why I never noticed it before. Anyone else have this?

If it's strictly the A/C then you hear the refrigerant spraying into the evaporator. You should hear it start spraying when the compressor kicks in and then for a few seconds after it cuts out.

The compressor cycles to keep the evaporator from freezing.

StraightOuttaCanadaEh · 03-18-2017, 02:30 AM

No this was just the non-A/C mode

Ultramaroon · 03-18-2017, 03:55 AM

Quote:

Originally Posted by StraightOuttaCanadaEh

No this was just the non-A/C mode

If it's just "ffffffffffffffffffffff....." then it's normal. If it's "zzzzzzzzzzzzzzz...." then maybe you have a leaf rubbing on the squirrel cage.

StraightOuttaCanadaEh · 03-18-2017, 01:27 PM

It's a zzzzzzz for sure. Like the buzz of electrical equipment

Ultramaroon · 03-18-2017, 02:41 PM

Yeah, the tiniest pine needle or whatever will act like the old playing-card-in-the-spokes trick. Annoying but meh. Sometimes it works itself free. ...sometimes.

Click the readme on my sig. Pick a manual and drill down.

Vehicle Interior > HEATING / AIR CONDITIONING > FRONT BLOWER MOTOR

Easy peezy.

Disclaimer: linked manuals are not mine and could go stale any time. Read it while you can.

Tcoat · 03-18-2017, 11:17 PM

Quote:

Originally Posted by StraightOuttaCanadaEh

It's a zzzzzzz for sure. Like the buzz of electrical equipment

Does it change with fan speed?

Quote:

Originally Posted by Ultramaroon

Yeah, the tiniest pine needle or whatever will act like the old playing-card-in-the-spokes trick. Annoying but meh. Sometimes it works itself free. ...sometimes.

Click the readme on my sig. Pick a manual and drill down.

Vehicle Interior > HEATING / AIR CONDITIONING > FRONT BLOWER MOTOR

Easy peezy.

Disclaimer: linked manuals are not mine and could go stale any time. Read it while you can.

Mine has had a slight ticking since day one. Sounds like the fam blades is just off kilter by a hair. I don't even notice it anymore unless I actively listen.

Ultramaroon · 03-19-2017, 01:43 AM

Quote:

Originally Posted by Tcoat

Does it change with fan speed?

Mine has had a slight ticking since day one. Sounds like the fam blades is just off kilter by a hair. I don't even notice it anymore unless I actively listen.

On low speed I can hear a slight runout on the commutator. The brushes don't quite squeak but they make a little noise. DGAF. Perfectly ok.

Tcoat · 03-19-2017, 01:53 AM

Quote:

Originally Posted by Ultramaroon

On low speed I can hear a slight runout on the commutator. The brushes don't quite squeak but they make a little noise. DGAF. Perfectly ok.

That could very well be it. I never worried enough to really pay that much attention.

03-17-2017, 12:13 PM	#1
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,871 Thanks: 1,255 Thanked 1,734 Times in 1,025 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	Noisy a/c vent? Noticed yesterday how annoying the din coming from the passenger footwell is when I have the A/C on. Doesn't matter where I direct the airflow to, that's where the sound comes from. Is the A/C pump or whatever located behind the dash there? If you ever had a very old TV that would produce this annoying constant tzzzzzzz sound, then you know what this sounds like. It's like white noise. I have to play music, otherwise it's drilling into my brain. Wonder why I never noticed it before. Anyone else have this?

03-18-2017, 02:41 PM	#11
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1118 Post(s) Tagged: 9 Thread(s)	Yeah, the tiniest pine needle or whatever will act like the old playing-card-in-the-spokes trick. Annoying but meh. Sometimes it works itself free. ...sometimes. Click the readme on my sig. Pick a manual and drill down. Vehicle Interior > HEATING / AIR CONDITIONING > FRONT BLOWER MOTOR Easy peezy. Disclaimer: linked manuals are not mine and could go stale any time. Read it while you can. __________________ service manuals

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03-17-2017, 12:21 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,432 Thanks: 29,826 Thanked 32,845 Times in 16,844 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	Sounds like a loose vent flap. I suggest you wiggle things around there to see if you can make it stop. Bubba says to push on things around there, then when you find what is buzzing, stuff a piece of dry sponge behind the housing that holds the vent. humfrz

03-17-2017, 12:31 PM	#3
murdoc Sometimes I'm wrong. Join Date: Mar 2013 Drives: '13 FR-S/'96 240SX Location: Frederick, MD Posts: 366 Thanks: 92 Thanked 316 Times in 152 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	I always assumed it was the blower motor bearings or fan making a noise. I fixed it with a catback.

03-17-2017, 03:57 PM	#6
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,871 Thanks: 1,255 Thanked 1,734 Times in 1,025 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	Well a catback is on its way so maybe that'll help lol

03-18-2017, 02:30 AM	#8
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,871 Thanks: 1,255 Thanked 1,734 Times in 1,025 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	No this was just the non-A/C mode

03-18-2017, 01:27 PM	#10
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,871 Thanks: 1,255 Thanked 1,734 Times in 1,025 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	It's a zzzzzzz for sure. Like the buzz of electrical equipment

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