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 (2271 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 (2188 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 (2179 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 (2165 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 (2154 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 (2152 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
Ultimate Carjunky / Moderator
Discretesignals profile image

Apr 11, 2012, 7:39 PM

Post #7 of 7 (2150 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)




Car makes humming sound when off


  Email This Post
 
 






Latest Forum Post

I have an 07 Durango that I recently purchased. It has about 130000 miles and h...


I have a 1991 chevy s-10, 4.3 motor that we can't get gas to spray out of the th...


I was driving the 1998 Volvo S70 at 40 mph. After crossing a railroad track the ...


I recently bought a 2002 dodge ram 1500 5.9 SLT and it run great. Everything in ...


2008 E350SD, 5.4 auto 275K. Engine won't crank, no flashing anti-theft. Bypassed...


Hi guys. I have a peugeot 307 hdi 2.0 90. I was driving home the other day and t...


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

web statistics