Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









Car makes humming sound when off


  Email This Post



Thegymnast
User

Apr 10, 2012, 1:31 AM

Post #1 of 7 (1978 views)
Shortcut
Car makes humming sound when off Sign In

It does this all the time when it's not even running and the doors are shut and nothing is on. It's all the time but I don't know what it is at all. The only thing I can think of is one time my cars alarm went off at night and drained the battery. Other than that I don't know what could be causing it? It's a 1994 Chrysler concord.


nickwarner
Veteran / Moderator
nickwarner profile image

Apr 10, 2012, 8:10 PM

Post #2 of 7 (1895 views)
Shortcut
Re: Car makes humming sound when off [In reply to] Sign In

Have you gotten under it to try to isolate where the noise is?


Thegymnast
User

Apr 10, 2012, 11:52 PM

Post #3 of 7 (1886 views)
Shortcut
Re: Car makes humming sound when off [In reply to] Sign In

Somewhere in the Passenger dash board but have no idea what it is


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 11, 2012, 4:58 PM

Post #4 of 7 (1872 views)
Shortcut
Re: Car makes humming sound when off [In reply to] Sign In

Find it. Look-see feel (Nick would go for that) but just find what is doing what and why.

Sorry Nick - feeling silly,

Tom
_________________________________________
Long retired now


nickwarner
Veteran / Moderator
nickwarner profile image

Apr 11, 2012, 7:13 PM

Post #5 of 7 (1861 views)
Shortcut
Re: Car makes humming sound when off [In reply to] Sign In

can you feel any air, even a little, blowing out of your vents when it is doing this? You could pull the lower trim off under the dash and put your hand on various items to see which one is doing it.


Thegymnast
User

Apr 11, 2012, 7:30 PM

Post #6 of 7 (1859 views)
Shortcut
Re: Car makes humming sound when off [In reply to] Sign In

I found it, it's a little fan that was under a small piece that pops off. It still runs when the door opens but it's quieter now.


Discretesignals
Veteran / Moderator
Discretesignals profile image

Apr 11, 2012, 7:39 PM

Post #7 of 7 (1857 views)
Shortcut
Re: Car makes humming sound when off [In reply to] Sign In

Aspirator fan motor for the in car temperature sensor. You must have automatic temp control. The little fan is used to draw air over the thermister in the sensor housing. This lets the BCM (body control module) know the temperature inside the car.


Quote
OPERATION The In-Car Sensor will automatically turn on when a vehicle door is opened. If the door is left open, the In-Car Sensor will automatically turn off within approximately 5 minutes. If the door is then closed, but there is no ignition start, the In-Car Sensor will automatically turn off after approximately 2 minutes. After the vehicle has been driven, the In-Car Sensor will turn off immediately when the ignition is turned off. The aspirator motor in the In-Car Sensor operates whenever the ignition switch is on (even when the ATC system off button is pushed). If the In-Car Sensor is open or shorted on this system, the digital display will turn off. Then the system defaults to manual operation.






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 Apr 11, 2012, 8:26 PM)




Advertising


  Email This Post
 
 






Latest Forum Post

Hey people, Just as soon as I've got rid of one car and got another, I've got a...


I apologize I have not got a lot of time in it so far, so I do not have a lot of...


I have a 1992 ford ranger 3.0l v6 5 speed. today i ran out of gas and when i got...


Hello I have a 1993 Toyota Corolla w/1.8L and 3 sp +overdrive tranny. I took it ...


2008 Nissan Sentra 2.0 50000 Miles The trunk wouldn't open neither with the rem...


on a 1998 Chrysler cirrus the heater blows warm thru the vents. When u turn it o...


Feed Button






Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap


Search for (options) Privacy