Q: Whenever I turn on the climate control system, I hear a high pitched whine

asked by on March 11, 2017

I immediately hear a high pitched whine on all fan speeds but as I increase the speed, the frequency of the sound seems to change. It sounds as though the whine is coming from behind the glove compartment. The whine sounds electronic. It completely goes away when the climate control system is turned off.

My car has 115000 miles.
My car has an automatic transmission.

Car is making a noise Inspection $94.99 - $114.99 Get a Quote

Hello, thank you for writing in. Your symptoms appear at first to be an issue with the blower motor. It is used to control the fan speed regardless of temperature. It is also located near where you report hearing the sound, and is electronically driven. Accessing the blower motor and replacing it can be intensive and require a lot of time. If you are comfortable testing with a voltmeter and removing the dash, you can do this repair at home. Otherwise you are going to want to seek professional help with testing the blower motor, and replacing it if needed. For more assistance with this, contact our service department to schedule an appointment.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Clunky noises whenever I reverse
The noise could be coming from your front control arm stabilizer bar link arms. These link arms connect your front stabilizer bar to the lower control arms and the arm joints could be defective. A certified mechanic, such as one...
Mice can get into the ventilation
Rodents can become a serious problem for almost any vehicle. If they don’t find their way into the HVAC system, they will often chew on wires, which can cause serious problems with vehicle operations. In this case, cutting and installing...
What does the daytime running lamps (DRL) on light mean?
The daytime running lamps (DRL) on light is located on your instrument panel. When the DRL on light is illuminated, the DRLs are in use. When the DRLs are turned off, the DRL on light will disappear.
Key won't turn in ignition
If moving the steering wheel while turning the key does not work, then try your extra key. If this does not work, then the ignition key cylinder will need replaced. I recommend having a mechanic, like one from YourMechanic, inspect...
2006 Mercedes Benz E55 W211 has the SRS lights that stay on
The light means that you have a problem with your air bag system ([https://www.yourmechanic.com/article/is-it-safe-to-drive-with-the-air-bag-light-on](https://www.yourmechanic.com/article/how-air-bags-work)) also known as the SRS (safety restraint system). Those are very, very complicated systems. You're going to have to find somebody who has a star level...
Steering suddenly notchy, only when running, fine when engine off, changed PS fluid and no help.
Hi, thanks for writing in. Although it's difficult to diagnose a steering issue remotely, the symptoms you're describing would lead me to the steering gearbox (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-steering-gear-adjuster-plug). In some cases, especially with about 175,000 miles on the vehicle, the steering gearbox...
P0234 code
Trouble code P0234 indicates the powertrain control module (PCM) senses a dangerously high boost pressure from the engine's forced induction system. Levels of boost in excess of recommended levels can compromise the structural integrity of the engine. If you need...
Engine shuts off when going over a bump.
Hi there. There is a loose ground wire on your vehicle that is moving around when you drive over bumps. Check all of the ground wires to the engine and the battery and tighten any wires that are loose. If...
Hi Im thinking, my mini needs soon a cloche repair you know how much is it ?
Hi there. A modern clutch system has multiple individual components that must all work together perfectly in order to allow your Mini to shift gears and accelerate. However, there are different procedures for repairing each of these parts and as...

Related articles

A Buyer’s Guide to the 2012 Toyota Corolla
Not Not only does the 2012 Toyota Corolla continue to be one of the best-selling compact sedans in the United States, but it also continues to maintain very high resale values. If you want a car that you’ll get your...
The Best Used Cars to Buy If You’re an Interior Designer
As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...
How to Use an iPod in a Toyota Prius
Gone Gone are the days of toting around cassette tapes or CDs in cases to keep tunes on hand when you're on the go. Today, we have playlists on our portable devices like iPods. When you don't have the latest...