Sam Canuck

Noisy Ac/heater Blower On Flow Through Setting Only

Recommended Posts

Hi have a strange problem that just cropped up on my 2008 IS250 with about 60,000 km. When the heater/AC blower is running on the flow-through setting only (not on recirculate) it makes a loud sound like a baseball card stuck in bicycle spokes. It stops after a few minutes but it is loud enough that I am running only on recirculate. Before I take this to the dealer, any suggestions? Please and thank you!!

Share this post


Link to post
Share on other sites

With the hood open inspect the cabin air intake at the base of the windshield for debris like leaves etc. If nothing is blocking the cabin air intake follow the next step.

With your AC set to AUTO and auto pass through,....turn off your car, open the glove box, remove the plastic parcel shelf (lift and pull out from the back and side). Slide up the black plastic panel at the back of the glove box which gives access to the cabin airbox and filter assembly. If the "white door" is down and you cannot see the filter assembly,... DO NOT LIFT the DOOR!!!! You can damage the mechanism!!

Turn back on the power and operate the AC controls until the door raises!

Once you have clear access lift and remove the filter and inspect for leaves or sucked in debris. Replace filter if scheduled,....usually once per year.

Run the AC to see if you can hear the noise before putting everything back.

  • Like 1

Share this post


Link to post
Share on other sites

I have the exact same problem. I checked everything you suggested with no luck. Sam did you find a solution ? Thanks

Share this post


Link to post
Share on other sites

Hi Vankee - Sorry for the very late reply. Edward's suggestion above worked for me. I suspected that the issue might have been related to an aftermarket filter so I got an new OEM filter, followed Edward's instructions and it worked. Because I did both, I'm not certain if it was the filter or if the previous installation was at fault.

Thanks to Edward!!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Similar Content

    • By btreiber
      Our AC control panel W/O Nav, just stopped working , no power to front or rear controls. I checked all fuses and they are good. I read somewhere to do a reset by unplugging the battery negative terminal. That worked for a very short time. Started the truck lights came on then went off. In another thread they said the LCD control unit needs to be replaced. I thought I'd reach out before I tried that. Any assistance would be appreciated. 
      Brian
    • By ed100
      i have a 1999 lexus rx300- only cold air on driver sided, luke worm on passager side.
      the heat servo motor is working.
      passenger side air seems to be getting a little warmer but driver side is very cold. Fan works great.
       
    • By armcomdes
      My first AC Pro recharge lasted 2 years. Next, 1 month. Last, 2 weeks.
      Do I trust my dealership with the repair? Or should I seek out a third-party repair somewhere in North NJ?
    • By denrainwater
      I've searched pretty extensively and found several posts that are ALMOST the same as my problem -- but not quite...
       
      My '96 LS400 runs very well and is well maintained.  But I've noticed that when I go on a long trip (two hours or more -- it usually takes quite a bit more than that), my heat or A/C airflow fades and eventually quits blowing.  It's not a coolant level issue -- it does the same with A/C as with heat.  Different RPMs don't make a difference either.  In order to get the control back, the car has to sit for a period of time (sometimes stopping for lunch will make it 'all better', and sometimes it requires an over-night stop. 

      Just driving around my normal daily life, it never happens -- so of course, I can never get it to my mechanic while it's acting up because I have to be several hours from home before the problem ever shows up!

      It would be my guess that the problem is located in a control that directs an airflow 'door' somewhere.  When the problem occurs, you can hear the fan running as normal (responding aurally to manual adjustments in fan-speed).  But the air quits flowing from ANY of the vents.  The air always comes from the correct ports (defrost, face, feet) when it IS flowing.  But when the problem surfaces, the air-flow simply tapers off to nothing.  

      It's really maddening since this car is my preferred driver, and it's BEAUTIFUL for long trips -- except for this!  If it's during the need for A/C, it's merely an inconvenience, as I don't mind driving with  my windows down for a while.  But when it's cold out (like on our trip home from our daughter's place more than three hours away last night), it can become a hazard, since I have no way to provide ANY airflow to the windshield, and keeping the windows from fogging up can become very challenging.  (Especially with two adults and two dogs, like I had last night...)

      Anyone else every experience this?  With winter here, I really need to find a way to address this.  But since I can never experience the problem except when I'm a few hundred miles from home, it's never practical to get it to my mechanic to examine things while it's acting up!

      Thanks in advance for any advice or shared experience...
      Dennis
    • By johnsnyder
      Recently, my battery died on my 2010 ES350. After jumping it, I noticed there's heat coming out of the driver's side (and rear) vents, but cold air coming out of the passenger's side vents. I checked fuses and everything seems to be fine. After some research, read that maybe the AC Blend Servo Door is stuck (or maybe I shorted it or something when I jumped it). Does anyone have any other thoughts/suggestions? Am I on the right track? If so, can anyone point me to a step-by-step of how to get to the blend door servo (I don't have a repair manual) to check or replace it?