2008 Impala noise from AC/Heater - Automotive Wiring and Electrical


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

2008 Impala noise from AC/Heater

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical

2wonder
User

Aug 19, 2015, 3:22 PM

Post #1 of 3 (1320 views)

2008 Impala noise from AC/Heater	Sign In

My 2008 Impala with 100k miles has just started making a noise from inside at the heater unit around the passenger foot area. It sounds like the fan is hitting something or the door opening and close device is not working correctly.

If I have just the heat or airflow on or turned off, it makes the noise unless I change the vent selection from say floor to dash. Then the noise stops but just for a few seconds and returns.

If I have the AC on, no noise until I turn of the AC or turn the car off, then the noise returns.

When the car is turned off the noise is there until the delayed electrical features such as lights go off.

Is this an electrical problem or an issue with the units air flow door mechanism?

Any ideas on how I can fix this????

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Aug 19, 2015, 5:40 PM

Post #2 of 3 (1308 views)

Re: 2008 Impala noise from AC/Heater	Sign In

Could be a mode door actuator gone bad. You'll need to get under the dash with a flashlight and try to pinpoint exactly where the noise is originating.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Aug 19, 2015, 5:41 PM)

2wonder
User

Aug 27, 2015, 4:57 AM

Post #3 of 3 (1281 views)

Re: 2008 Impala noise from AC/Heater	Sign In

Thanks, it was a door actuator. I found an excellent utube video on how to replace it and did the repair myself.

Search for (options) Privacy Sitemap